|
Self-diagnosis for the Motronic system
Fault table
Notes:
-
◆ The fault table is arranged according to the 5- digit fault code on the left.
-
◆ Sporadic faults are marked "SP" (sporadic fault) on the V.A.G 1551 display.
-
◆ If a stored fault does not appear within the next 40 engine starts, the fault code will be automatically erased.
-
◆ Before replacing components indicated as being faulty, check the wiring and connectors to these components and the earth connections against the current flow diagram.
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V.A.G 1551 printout
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Possible cause of fault
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Possible effects
|
Fault remedy
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00282
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-V60 throttle valve positioner
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Implausible signal
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- Throttle valve sticking
- Fault in the wiring for the throttle valve positioner
|
- Idling speed too high
- Idling speed control goes into emergency operating mode
- Cruise control system is switched off
|
- Check the -V60 throttle valve positioner without CCS
Check the cruise control system
=> Electrical System; Repair Group 96
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|---|
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V.A.G 1551 printout
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Possible cause of fault
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Possible effects
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Fault remedy
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00282
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-V60 throttle valve positioner
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Adaptation limit exceeded
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- -V60 throttle valve positioner defective
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- Idling speed too high
- Idling speed control goes into emergency operating mode
- Cruise control system is switched off
|
- Check the -V60 throttle valve positioner without CCS
=> Page 24-91
Check the cruise control system
=> Electrical System; Repair Group 96
|
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V.A.G 1551 printout
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Possible cause of fault
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Possible effects
|
Fault remedy
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00515
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-G40 Hall sensor
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Open circuit/short to positive
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- Open circuit or short to positive
- Sensor disc out of position
- -G40 defective
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- No engine power at full throttle
- Emission values not OK
- High fuel consumption
|
- Check Hall sensor
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Short to earth
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- Short to earth
- -G40 defective
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00528
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F96 altitude sensor
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Signal too high
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- Open circuit or short to positive
- -F96 defective
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- Possibly poor starting
|
- Check altitude sensor
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Signal too low
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- Short to earth
- Fault in power supply to -F96
- -F96 defective
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- Reduced boost pressure (safety limitation for turbocharger speed)
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V.A.G 1551 printout
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Possible cause of fault
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Possible effects
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Fault remedy
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00532
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Voltage supply
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Signal too high
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- Excess voltage from assisted start
- Alternator defective
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- Damage to the engine control unit
|
- Check battery voltage
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Signal too low
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- Voltage supply less than 10 V for more than 1 second
- Poor wiring to engine control unit
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- Engine will not start
- Engine running problems, engine may even stop
- Learning procedure for throttle valve control unit not possible
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- Check power supply to control unit
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- Battery discharged
- Current drain with ignition off
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- Check battery charge level
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Notes on fault code 00532:
-
◆ If the fault is shown as a sporadic fault, ignore the fault message on the display. This fault is often stored when the engine is left idling for a long period with a large number of electrical consumers switched on causing the battery to become greatly discharged.
-
◆ The fault message "Signal too low" is stored if the supply voltage falls below 10.00 V for more than 1 second. (The control unit will not function at less than 6.5 V.)
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V.A.G 1551 printout
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Possible cause of fault
|
Possible effects
|
Fault remedy
|
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00543
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Maximum revs exceeded
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- Engine over revving (e.g. wrong gear engaged)
- Engine speed greater than 7100 rpm
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- Possible engine damage
|
- Rectify mechanical damage
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00544
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Maximum boost pressure exceeded
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- Hoses interchanged, not connected, blocked or leaking
- Solenoid valve for boost pressure control defective
- Pressure unit for turbocharger defective
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- Loss of power (overrun cut-off until boost pressure falls to a non critical level)
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- Check boost pressure control => Page 24-34
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- Short to earth
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- Check solenoid valve for boost pressure control
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- Altitude sensor defective
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- Reduced boost pressure
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- Check altitude sensor
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V.A.G 1551 printout
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Possible cause of fault
|
Possible effects
|
Fault remedy
|
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00561
Mixture adaptation
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Adaptation limit (add) exceeded
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- Fuel system pressure too low
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- Vehicle bucking
|
- Fill up vehicle, check fuel -system pressure => Page 24-15
|
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Adaptation limit (mul) exceeded
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- Incorrect signal from air mass meter
|
- Increased fuel consumption
|
- Check air mass meter => Page 24-31
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- Leaks in exhaust system upstream of catalytic converter
- Unmetered air downstream of air mass meter
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- Possibly rough idling
- Vehicle bucking
|
- Rectify leaks
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|
|
|
- Coked injectors
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|
- Check injection quantity
|
Notes:
-
◆ (add) = additive, i.e. fault only occurs during idling.
-
◆ (mul) = multiplicative, i.e. fault occurs throughout the entire engine speed range and load range.
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V.A.G 1551 printout
|
Possible cause of fault
|
Possible effects
|
Fault remedy
|
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00561
Mixture adaptation
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Adaptation limit (add) not reached
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- Fuel system pressure too low
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- Vehicle bucking
|
- Fill up vehicle, check fuel system pressure => Page 24-15
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|
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Adaptation limit (mul) not reached
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- Incorrect signal from air mass meter
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- Increased fuel consumption
|
- Check air mass meter => Page 24-31
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- Fuel in engine oil
- Unmetered air downstream of air mass meter
|
- Possibly rough idling
- Vehicle bucking
|
- Drive vehicle on a motorway for 15 minutes or change oil
Rectify leaks
|
|
|
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- Injectors leaking
|
- Black smoke
|
- Check injection quantity
|
Notes:
-
◆ (add) = additive, i.e. fault only occurs during idling.
-
◆ (mul) = multiplicative, i.e. fault occurs throughout the entire engine speed range and load range.
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V.A.G 1551 printout
|
Possible cause of fault
|
Possible effects
|
Fault remedy
|
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00575
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Intake manifold pressure
|
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Control limit not reached
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- Signal from air mass meter too low
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- Increased power
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- Check air mass meter => Page 24-31
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- Unmetered air between air mass meter and turbocharger
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- Check intake system
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|
|
- Turbocharger pressure unit sticking
- Solenoid valve for boost pressure control defective
- Short circuit or open circuit
|
- Poor performance
|
- Check boost pressure control => Page 24-34
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|
|
Control limit exceeded
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- Signal from air mass meter too high
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- Poor performance
|
- Check air mass meter => Page 24-31
|
|
|
|
- Turbocharger pressure unit sticking
- Solenoid valve for boost pressure control defective
|
- Increased power
|
- Check boost pressure control => Page 24-34
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V.A.G 1551 printout
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Possible cause of fault
|
Possible effects
|
Fault remedy
|
|
00670
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-G127 sensor for throttle valve positioner
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Signal too low
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- Short to earth
- Fault in power supply to -G127
- -G127 defective
|
- Idling speed too high
- No idling speed control
- Load change jolt on accelerator release
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- Check sensor for -G127 throttle valve positioner without CCS => Page 24-74
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|
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Signal too high
|
- Open circuit or short to positive
- Fault in earth supply to -G127
- -G127 defective
|
- AC compressor only activated at high engine speeds
|
- Check sensor for -G127 throttle valve positioner with CCS => Page 24-91
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|
|
Implausible signal
|
- Throttle valve sticking
- Fault in wiring to -G127
|
|
|
Notes on fault code 00670:
-
◆ The sensor for the throttle valve positioner is located in the J338 throttle valve control unit.
-
◆ The sensor is a potentiometer, which reports the position of the throttle valve positioner to the control unit.
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|
|---|
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V.A.G 1551 printout
|
Possible cause of fault
|
Possible effects
|
Fault remedy
|
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00671
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-E45 switch for CCS
|
|
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|
|
Implausible signal
|
- -E45 defective
- Open circuit or short circuit
|
- Cruise control system is switched off
|
- Check the cruise control system (CCS)
|
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V.A.G 1551 printout
|
Possible cause of fault
|
Possible effects
|
Fault remedy
|
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01119
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Gear recognition signal
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Open/short to positive
|
- Open circuit or short to positive
- -F125 defective
|
- Brief and slightly more pronounced engine speed fluctuations when engaging or disengaging a gear
|
- Check wiring to -F125 multifunction switch
=> Current Flow Diagrams, Electrical Fault Finding and Fitting Locations binder
|
|
|
Short to earth
|
- Short to earth
- -F125 defective
|
|
- Interrogate the fault memory for gearbox
|
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V.A.G 1551 printout
|
Possible cause of fault
|
Possible effects
|
Fault remedy
|
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01165
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-J338 throttle valve control unit
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Control limit not reached
|
- Throttle valve sticking
- Actuator mechanics sticking
|
- Increased idling speed
- Load change jolt on accelerator release
|
- Check throttle valve control unit without CCS
=> Page 24-61
|
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Control limit exceeded
|
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Control difference
|
- Open circuit to -V60 throttle valve positioner
|
|
- Check throttle valve control unit with CCS
=> Page 24-78
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V.A.G 1551 printout
|
Possible cause of fault
|
Possible effects
|
Fault remedy
|
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01182
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|
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Height adaptation
|
|
|
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Signal outside tolerance
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- -G69 throttle valve potentiometer defective
|
- Starting problems
- Poor throttle response
|
- Check -G69 throttle valve potentiometer without CCS => Page 24-88
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- Wrong throttle valve unit fitted
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- Starting problems
|
- Check part number
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- Unmetered air
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- Rectify unmetered air
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- Air cleaner blocked
|
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- Replace air cleaner
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V.A.G 1551 printout
|
Possible cause of fault
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Possible effects
|
Fault remedy
|
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01247
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-N80 solenoid valve 1 for activated carbon canister
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Short to earth
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- Short to earth
- -N80 defective
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- Possibility of bucking in part load range
|
- Check solenoid valve 1 for activated carbon canister
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Short to positive
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- Short to positive
- -N80 defective
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- Car may smell of petrol
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Output open
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- Open circuit
- -N80 defective
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V.A.G 1551 printout
|
Possible cause of fault
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Possible effects
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Fault remedy
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01249
Injector, cylinder 1 -N30
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01250
Injector, cylinder 2 -N31
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01251
Injector, cylinder 3 -N32
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01252
Injector, cylinder 4 -N33
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Short to earth
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- Short to earth
- Injector defective
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- Irregular engine running
- Engine stops
|
- Check injectors
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Short to positive
|
- Short to positive
- Injector defective
|
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Output open
|
- Open circuit
- Injector defective
|
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V.A.G 1551 printout
|
Possible cause of fault
|
Possible effects
|
Fault remedy
|
|
01259
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|
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-J17 fuel pump relay
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Open circuit/short circuit to earth
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- Open circuit
- -J17 fuel pump relay
- -defective
|
- Engine will not start
- Engine stops
- Several faults may be recorded
|
- Check fuel pump relay => Page 24-26
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- Short to earth
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- Fuel pump runs continuously when ignition is on
|
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Short to positive
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- Short to positive
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- Engine will not start
- Engine stops
- Several faults may be recorded
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Note:
If fault code "01259" has been stored, fault codes "01247 / 01249 / 01250 / 01251 / 01252 / 1262 / 16486" may also be stored, as these components are supplied with power from the fuel pump relay.
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V.A.G 1551 printout
|
Possible cause of fault
|
Possible effects
|
Fault remedy
|
|
01262
-N75 solenoid valve for boost pressure control
|
|
|
|
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Short to earth
|
- Short to earth
- -N75 defective
|
- Loss of power (overrun cut-off until boost pressure falls to a non critical level)
- Boost pressure too high
- Fault 0544 maximum boost pressure exceeded/ stored
|
- Check solenoid valve for boost pressure control
|
|
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Short to positive
|
- Short to positive
- -N75 defective
|
- Poor performance
- Boost pressure too low
|
|
|
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Output open
|
- Open circuit
- -N75 defective
|
|
|
|
|
|---|
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V.A.G 1551 printout
|
Possible cause of fault
|
Possible effects
|
Fault remedy
|
|
01314
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|
Engine control unit
|
|
|
|
|
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Defective
|
|
- CCS not working
|
- Replace engine control unit => Page 24-10
|
|
V.A.G 1551 printout
|
Possible cause of fault
|
Possible effects
|
Fault remedy
|
|
16486
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|
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-G70 air mass meter
|
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|
|
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Signal too low
|
- Open circuit or short to earth
- -G70 defective
|
- Scarcely perceptible change in performance
|
- Check air mass meter => Page 24-31
|
|
|
|
- Unmetered air
- Air cleaner blocked
|
|
- Check intake system
|
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16487
|
|
|
|
|
-G70 air mass meter
|
|
|
|
|
|
Signal too high
|
- Open circuit or short to positive
- -G70 defective
|
- Scarcely perceptible change in performance
|
- Check air mass meter => Page 24-31
|
|
|
|---|
|
V.A.G 1551 printout
|
Possible cause of fault
|
Possible effects
|
Fault remedy
|
|
16496
|
|
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|
|
-G42 sensor for intake air temperature.
|
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|
|
|
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Signal too low
|
- Short to earth
- -G42 defective
|
- Emergency operation (substitute value constant +19.5 °C)
|
- Check sensor for intake air temperature
|
|
16497
|
|
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|
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-G42 sensor for intake air temperature
|
|
|
|
|
|
Signal too high
|
- Open circuit or short to positive
- -G42 defective
|
- Emergency operation (substitute value constant +19.5 °C)
|
- Check sensor for intake air temperature
|
|
V.A.G 1551 printout
|
Possible cause of fault
|
Possible effects
|
Fault remedy
|
|
16500
|
|
|
|
|
-G62 sensor for coolant temperature
|
|
|
|
|
|
Implausible signal
|
- Moisture or corrosion on connector
- Loose contact
- -G62 defective
|
- Cold start problems at very low temperatures
- Engine running problems when warm
|
- Check sensor for intake air temperature
|
|
16501
-G62 sensor for intake air temperature
|
|
- Increased fuel consumption
- Emission values not OK
|
|
|
|
Signal too low
|
- Short to earth
- -G62 defective
|
|
|
|
16502
|
|
|
|
|
-G62 sensor for coolant temperature
|
|
|
|
|
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Signal too high
|
- Open circuit or short to positive
- -G62 defective
|
|
|
|
V.A.G 1551 printout
|
Possible cause of fault
|
Possible effects
|
Fault remedy
|
|
16505
|
|
|
|
|
-G69 throttle valve potentiometer
|
|
|
|
|
|
Implausible signal
|
- Moisture or corrosion in the connector
- -G69 defective
|
- Acceleration bucking
- Rough idling
|
- Check -G69 throttle valve potentiometer without CCS => Page 24-71
|
|
16506
|
|
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|
|
-G69 throttle valve potentiometer
|
|
|
|
|
|
Signal too low
|
- Open circuit or short to earth
- -G69 defective
|
- Acceleration bucking
- Load change jolt on accelerator release
|
- Check -G69 throttle valve potentiometer with CCS => Page 24-88
|
|
16507
|
|
|
|
|
-G69 throttle valve potentiometer
|
|
|
|
|
|
Signal too high
|
- Open circuit or short to positive
- -G69 defective
|
- Acceleration bucking
- Load change jolt on accelerator release
|
|
Note on fault code 16505:
The air throughput (air mass) at the relevant speed is checked with the throttle angle.
Notes on fault codes 16505, 16506 and 16507:
-
◆ As soon as the error is identified, the control unit uses a substitute value formed from the speed.
-
◆ If an error occurs simultaneously on the G69 throttle valve potentiometer and the air mass meter, no emergency operation function is possible. Consequence: The engine stalls.
|
V.A.G 1551 printout
|
Possible cause of fault
|
Possible effects
|
Fault remedy
|
|
16514
|
|
|
|
|
Bank 1 - Probe 1
|
|
|
|
|
|
Electrical fault in circuit
|
- Corrosion due to moisture on connector
- Short circuit between signal line for lambda probe and reference earth wire for lambda probe
|
- Lambda control not working (mixture formation is controlled)
|
- Check lambda control
|
|
|
|
- Amplitude in signal line too low (lambda probe contaminated or probe slots clogged or dirty)
|
- Rough idling
- Emission values not OK
- Increased fuel consumption
|
- Check lambda probe signal line and actuation => Page 24-54
|
|
|
|---|
|
V.A.G 1551 printout
|
Possible cause of fault
|
Possible effects
|
Fault remedy
|
|
16515
|
|
|
|
|
Bank 1 - Probe 1
|
|
|
|
|
|
Voltage too low
|
- Short to earth or short to screening in lambda probe signal line
- Short to earth or short to screening in lambda probe reference earth line
- Lambda probe defective
|
- Lambda control not working (mixture formation is controlled)
- Rough idling
- Emission values not OK
- Increased fuel consumption
|
- Check lambda control
|
|
16516
|
|
|
|
|
Bank 1 - Probe 1
|
|
|
|
|
|
Voltage too high
|
- Short to positive in signal line
|
|
|
|
V.A.G 1551 printout
|
Possible cause of fault
|
Possible effects
|
Fault remedy
|
|
16518
|
|
|
|
|
Bank 1 - Probe 1
|
|
|
|
|
|
No activity
|
- Short to earth in reference earth line
- Lambda probe defective (dirty)
|
- Rough idling
- Emission values not OK
|
- Check lambda control
|
|
|
|
- Lambda probe heating not functioning
|
- Increased fuel consumption
- Soot deposits on spark plugs
|
- Check fuel pump relay => Page 24-51
|
|
16519
|
|
|
|
|
Bank 1 - Probe 1
|
|
|
|
|
|
Electrical fault in heating circuit
|
- Open circuit or short circuit
|
- Lambda probe heating not functioning
|
- Check lambda probe heating => Page 24-51
|
|
V.A.G 1551 printout
|
Possible cause of fault
|
Possible effects
|
Fault remedy
|
|
16705
|
|
|
|
|
-G28 engine speed sensor
|
|
|
|
|
|
Implausible signal
|
- Sensor disc loose or bent
|
- Poor starting
- Engine misfiring
|
- Remove oil sump and check sensor disc
|
|
|
|
- -G28 engine speed sensor defective
- Loose contact
- Open circuit in screening
|
|
- Check engine speed sensor
|
|
16706
|
|
|
|
|
-G28 engine speed sensor
|
|
|
|
|
|
No signal
|
- Open circuit or short circuit
- -G28 engine speed sensor loose or defective
|
- Engine will not start
- Engine cuts out
|
- Check engine speed sensor
|
|
V.A.G 1551 printout
|
Possible cause of fault
|
Possible effects
|
Fault remedy
|
|
16711
|
|
|
|
|
-G61 knock sensor 1
|
|
|
|
|
|
Signal too low
|
|
|
|
|
16716
|
|
|
|
|
-G66 knock sensor 2
|
|
|
|
|
|
Signal too low
|
- Knock sensor loose or corrosion on connector
|
- High fuel consumption
- Poor performance
|
- Tightening torque for knock sensor: 20 Nm
|
|
|
|
- Open circuit or short to earth
- Knock sensor defective
|
|
- Check knock sensor
|
|
V.A.G 1551 printout
|
Possible cause of fault
|
Possible effects
|
Fault remedy
|
|
16885
|
|
|
|
|
Vehicle speed signal
|
|
|
|
|
|
Implausible signal
|
- Open circuit between -G22 speedometer sensor and dash panel insert
- Open circuit between dash panel insert and engine control unit
- -G22 defective
- Dash panel insert defective
|
- Engine control unit does not deactivate air conditioner compressor
- Poor load change performance
|
- Check speed signal => Page 24-106
|
|
16989
|
|
|
|
|
Control unit defective
|
|
|
|
|
|
|
- Engine control unit defective
|
- Engine will not start
|
- Replace engine control unit => Page 24-10
|
|
V.A.G 1551 printout
|
Possible cause of fault
|
Possible effects
|
Fault remedy
|
|
17733
Knock control cyl. 1
|
|
|
|
|
17734
Knock control cyl. 2
|
|
|
|
|
17735
Knock control cyl. 3
|
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17736
Knock control cyl. 4
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Control limit reached
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- Poor quality fuel (less than RON 91)
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- High fuel consumption
- Poor performance
- Irregular engine running
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- Fill up with petrol of at least RON 91
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- Knock sensor tightened with incorrect torque
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- Tighten knock sensor (20 Nm)
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- Abnormal engine noise (ancillaries loose)
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- Check knock control
=> Page 28-21
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V.A.G 1551 printout
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Possible cause of fault
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Possible effects
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Fault remedy
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17913
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-F60 idling switch
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Does not close / open circuit
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- Throttle cable setting
- Floor mat pressing down on accelerator
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- Idling speed too high
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- Adjust throttle cable
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- Throttle valve sticking
- Open circuit or short to positive
- -F60 idling switch defective
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- Idling speed control not functioning
- Load change jolt on accelerator release
- AC compressor only activated at high engine speeds
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- Check idling switch
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17914
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-F60 idling switch
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Does not open / short to earth
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- Moisture in throttle valve connector
- Short to earth
- -F60 idling switch defective
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V.A.G 1551 printout
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Possible cause of fault
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Possible effects
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Fault remedy
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17953
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Throttle valve control
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Faulty
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- Open circuit
- Throttle valve stiff or dirty
- -G69 and -G127 defective
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- Idling speed too high
- Load change jolt on accelerator release
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- Check -J338 throttle valve control unit - without CCS => Page 24-78
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17966
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Throttle valve drive
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Electrical fault in circuit
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- Short to earth
- short to positive
- -V60 throttle valve positioner defective
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- Idling speed too high
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- Check throttle valve positioner without CCS => Page 24-93
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V.A.G 1551 printout
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Possible cause of fault
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Possible effects
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Fault remedy
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17967
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-J338 throttle valve control unit
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Fault in basic setting
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- Idling switch open or open circuit
- Throttle valve sticks and will not close
- Pulse detected by engine speed sensor
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- Adaptation of throttle valve control unit not performed
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- Adapt the throttle valve control unit
=> Page 24-79
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17972
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-J338 throttle valve control unit
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Undervoltage in basic setting
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- Voltage less than 10 V during basic setting
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- Check voltage, read measured value blockDisplay Group 03, display zone 2=> Page 01-86
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V.A.G 1551 printout
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Possible cause of fault
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Possible effects
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Fault remedy
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17978
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Engine control unit
blocked
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- Attempted tampering
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- Engine starts but cuts out again immediately
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- Adapt engine electronics control unit to electronic immobilizer
=> Electrical System; Repair Group 01; immobilizer self-diagnosis
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- Short circuit in the communication line
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- Check the electronic immobilizer
=> Electrical System; Repair Group 01; immobilizer self-diagnosis
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- Immobilizer control unit defective/missing
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Note on fault code 17978:
If an attempt is made to start the car with a key which has not been adapted, a static fault will be recorded. If the car is then started with a correctly adapted key, the fault will be re-classified as a sporadic fault.
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V.A.G 1551 printout
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Possible cause of fault
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Possible effects
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Fault remedy
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18010
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Power supply term. 30
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Voltage too low
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- Battery was disconnected
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- All learned values erased
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- Erase fault memory and continue to observe vehicle
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- Open circuit
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- Check power supply for control unit
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18020
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Engine control unit incorrectly encoded
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- Engine control unit incorrectly encoded
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- Loss of performance
- Increased emission values
- Various faults in fault memory
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- Encode control unit
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V.A.G 1551 printout
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Possible cause of fault
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Possible effects
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Fault remedy
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18034
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CAN bus fault. Message from gearbox control unit
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- Fault in the data lines to the gearbox control unit
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- Automatic gearbox goes into emergency operation
- Engine running problems (gearshift jolt, load change jolt)
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- Checking the Motronic system/ABS/gearbox data exchange (CAN bus) => Page 24-116
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18259
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CAN bus fault. Message from ABS control unit
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- Fault in the data line to the ABS control unit (antilock system)
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- No driving dynamics control
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- Checking the Motronic system/ABS/gearbox data exchange (CAN bus) => Page 24-116
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