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Fault table, fault codes 00525...17978
Fault table, fault codes 00525...17978
Notes on fault table
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V.A.G 1551 print-out
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Possible causes of fault
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Possible effects
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Fault remedy
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00525
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Lambda probe -G39
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Short to positive
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- Wiring short to positive
- -G39 defective
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- No Lambda control
- Rough idling
- Increased fuel consumption
- Spark plugs sooted
- Increased emission values
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- Check Lambda probe and Lambda control
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Signal too small
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- Wiring short to earth
- -G39 defective
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Signal too large
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- -G39 defective
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V.A.G 1551 print-out
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Possible causes of fault
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Possible effects
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Fault remedy
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00530
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Throttle valve positioner/potentiometer -G881)
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Open circuit/short to positive
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- Wiring open circuit or short to positive
- -G88 defective
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- Cold starting problems
- Cold idling problems
- Idling speed not within tolerance
- Rough idling
- Load change jolt when decelerating
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- Adapt engine control unit to throttle valve control part
, checking throttle valve control part
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Short to earth
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- Wiring short to earth
- -G88 defective
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1)
The throttle valve positioner/potentiometer (G88) is a component of the throttle valve control part (J338).
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V.A.G 1551 print-out
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Possible causes of fault
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Possible effects
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Fault remedy
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00532
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Supply voltage
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Signal too large
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- Voltage supply above
- 16 V (alternator defective)
- Excessive voltage caused by jump starting
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- Engine control unit damaged
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- Check alternator:
=> Current flow diagrams, Electrical fault finding and Fitting locations binder
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Signal too small
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- Voltage supply less than 10 V
- Engine control unit has poor earth connection
- Battery discharged
- Current draw when ignition is off
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- Idling speed not in specified range
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- Check engine control unit voltage supply
Check charge state of battery
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- Engine control unit learnt values are lost
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- Adapt engine control unit to throttle valve control part
=> Page 24-112
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Note to fault code 00532:
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◆ If the fault is indicated as a sporadic fault, ignore the fault information! This fault can be stored when the engine is running for a long time at idling with lots of electrical consumers switched on and the battery is heavily discharged.
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◆ The fault type "Signal too small" will be stored 60 seconds after starting if the voltage supply drops below 10.08 V for longer than 2 seconds (the control unit will not function below 6.0 V).
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◆ Voltage supply is not checked when starting engine.
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V.A.G 1551 print-out
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Possible causes of fault
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Possible effects
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Fault remedy
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00543
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Maximum revs exceeded
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Signal too large
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Engine code AFK:
- Speed was above 7300 rpm (missed gear)
Engine code AHW:
- Speed was above 6600 rpm (missed gear)
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- Possible damage to valves and pistons (contact)
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- Check engine for damage and erase fault memory => Page 01-13
, interrogating and erasing fault memory
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V.A.G 1551 print-out
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Possible causes of fault
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Possible effects
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Fault remedy
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00609
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Ignition output 1
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Short to positive
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- Wiring short to positive
- -G152 defective
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- Engine will not start
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- Check ignition transformer
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Short to earth
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- Wiring short to earth
- -G152 defective
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Output open
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- Wiring open circuit
- -G152 defective
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- Engine control unit signal output defective (engine control unit defective)
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- Replace engine control unit
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V.A.G 1551 print-out
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Possible causes of fault
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Possible effects
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Fault remedy
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00610
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Ignition output 2
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Short to positive
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see fault code 00609, ignition output 1, relating to ignition output 2
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Short to earth
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Output open
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Note on fault codes 00609 and 00610:
Ignition outputs 1 and 2 are the outputs on the engine control unit via which the engine control unit activates the ignition transformer.
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V.A.G 1551 print-out
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Possible causes of fault
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Possible effects
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Fault remedy
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00653
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Plausibility selector lever/gearbox
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Implausible signal
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- Wiring from engine control unit to automatic gearbox control unit
- Loose contact or corrosion due to moisture in connector
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- Engine running problems (gear shift jerk, load change jolt)
- Idling speed not within tolerance range
- Idling speed fluctuates
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- Check driving range signal
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Note on fault code 00653:
On vehicles with an automatic gearbox the engine control unit recognises whether a gear is engaged.
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V.A.G 1551 print-out
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Possible causes of fault
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Possible effects
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Fault remedy
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01044
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Control unit incorrectly coded
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- Engine control unit or engine replaced
- ABS control unit
- replaced
- Airbag control unit
- replaced
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- Engine running problems (gear shift jerk, load change jolt, etc.)
- Increased fuel consumption
- Increased emission values
- A fault has been stored which does not exist
- Functions not performed (Lambda control, activated charcoal filter system activation, etc.)
- Reduced gearbox life
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- Code engine control unit
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V.A.G 1551 print-out
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Possible causes of fault
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Possible effects
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Fault remedy
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01087
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Basic setting not carried out
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- Throttle valve control part has been removed and installed
- Throttle valve control part and/or engine control unit or engine have been replaced
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- Idling speed not within tolerance range
- Idling speed fluctuates
- No full throttle recognition
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- Adapt engine control unit to throttle valve control part
=> Page 24-35
, checking throttle valve control part
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- Adapting the engine control unit to the throttle valve control part was interrupted. The cause of this could be that e.g. the starter or the accelerator pedal was operated during the adaption procedure.
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- Repeat the adaption of engine control unit to the throttle valve control part => Page 24-112
, adapting engine control unit to throttle valve control part
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V.A.G 1551 print-out
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Possible causes of fault
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Possible effects
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Fault remedy
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01126
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Engine speed signal
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Short to positive
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- Wiring open circuit or short to positive
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- Check engine speed signal=> Page 24-71
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Short to earth
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- Wiring short to earth
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V.A.G 1551 print-out
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Possible causes of fault
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Possible effects
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Fault remedy
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01180
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Engine/gearbox electrical connection
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Short to positive
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- Short to positive in the wiring from engine control unit to air conditioner compressor
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- Air conditioning system/A/C compressor does not function
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- Check engine/air conditioner compressor electrical connection
, final control diagnosis
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Short to earth
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- Short to earth in the wiring from engine control unit to air conditioner compressor
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Output open
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- Wiring open circuit between engine control unit and air conditioner compressor
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- Engine control unit signal output defective (engine control unit defective)
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- Replace engine control unit
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V.A.G 1551 print-out
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Possible causes of fault
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Possible effects
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Fault remedy
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01247
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Activated charcoal filter solenoid valve 1 -N80
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Short to earth
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- Wiring short to earth
- -N80 defective
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- Possible jerking in part throttle range
- It is possible that the vehicle smells of fuel
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- Check N80
=> Page 01-58
, final control diagnosis
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Short to positive
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- Wiring short to positive
- -N80 defective
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Output open
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- Wiring open circuit
- Supply voltage for N80 defective
- -N80 defective
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- Engine control unit signal output defective (engine control unit defective)
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- Replace engine control unit
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V.A.G 1551 print-out
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Possible causes of fault
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Possible effects
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Fault remedy
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01249
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No.1 cyl. injector -N30
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Short to positive
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- Short to positive in the wiring between injector and engine control unit
- Injector defective
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- Engine runs rough/stalls
- Increased emission values
- Poor starting characteristics
- Engine running problems
- Poor acceleration
- Rough idling
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- Check injectors
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Short to earth
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- Short to earth in the wiring between injector and engine control unit
- Injector defective
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Output open
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- Voltage supply for injector defective
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- Engine control unit signal output defective (engine control unit defective)
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- Replace engine control unit
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V.A.G 1551 print-out
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Possible causes of fault
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Possible effects
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Fault remedy
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01250
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No. 2 cyl. injector -N31
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Short to positive
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see fault code 01249, No. 1 Cyl., but for N31
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Short to earth
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Output open
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01251
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No. 3 cyl. injector -N32
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Short to positive
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see fault code 01249, No. 1 Cyl., but for N32
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Short to earth
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Output open
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V.A.G 1551 print-out
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Possible causes of fault
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Possible effects
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Fault remedy
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01252
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No. 4 cyl. injector -N33
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Short to positive
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see fault code 01249, No. 1 Cyl., but for N33
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Short to earth
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Output open
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V.A.G 1551 print-out
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Possible causes of fault
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Possible effects
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Fault remedy
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01259
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Fuel pump relay -J17
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Short to positive
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- Short to positive in the wiring between J17 and engine control unit
- -J17 defective
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- Engine starts briefly and then stalls again
- Engine will not start
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- Check -J17
, final control diagnosis
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Short to earth
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- Short to earth in the wiring between J17 and engine control unit
- J17 defective
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Output open
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- Voltage supply for J17 defective
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- Engine control unit signal output defective (engine control unit defective)
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- Replace engine control unit
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Note on fault code 01259:
If the fault "01259" is stored the faults "01247, 01249...01252 could also be stored as these components are supplied with voltage via the fuel pump relay.
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V.A.G 1551 print-out
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Possible causes of fault
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Possible effects
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Fault remedy
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01265
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Exhaust gas recirculation valve -N18
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Short to positive
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- Short to positive in the wiring between N18 and engine control unit
- -N18 defective
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- No exhaust gas recirculation
- Increased fuel consumption
- Increased emission values
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- Check N18
=> Page 01-58
, final control diagnosis
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Short to earth
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- Short to earth in the wiring between N8 and engine control unit
- -N18 defective
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Output open
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- Voltage supply for N18 defective
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- Engine control unit signal output defective (engine control unit defective)
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- Replace engine control unit
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V.A.G 1551 print-out
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Possible causes of fault
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Possible effects
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Fault remedy
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01312
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Data bus drive defective
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- Wiring open circuit or short to positive
- Fault in data wires to airbag, dash panel insert or ABS control unit
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- Engine running problems (gear shift jerk, load change jolt, etc.)
- Increased fuel consumption
- Increased emission values
- A fault has been stored which does not exist
- Functions not performed (Lambda control, activation of activated charcoal filter system, etc.)
- Reduced gearbox life
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- Check data bus wiring
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V.A.G 1551 print-out
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Possible causes of fault
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Possible effects
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Fault remedy
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01316
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Brake control unit no communication
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- Wiring open circuit between engine control unit and ABS control unit
- Signal wire of engine control unit and/or signal wire of ABS control unit defective
- ABS control unit incorrectly coded
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- Check data bus
Code ABS control unit:
=> Running gear self-diagnosis for ABS; Repair group 01; Performing self-diagnosis; Coding control unit
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V.A.G 1551 print-out
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Possible causes of fault
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Possible effects
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Fault remedy
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01317
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Dash panel insert no communication
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- Fault in data wires to dash panel insert control unit
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- Combi-instrument does not indicate speed
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- Check data bus
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01321
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Airbag no communication
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- No crash fuel shut-off
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- Check data bus
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V.A.G 1551 print-out
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Possible causes 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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- Start attempted with an unauthorised key.
- Attempted manipulation
- Short in communication wire
- Fault in immobilizer system
- Immobilizer control unit defective/missing
- Engine control unit has been replaced and not adapted to the immobilizer
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- Engine starts briefly and then stops again
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- Adapt engine control unit to electronic immobilizer => Page 24-116
Check electronic immobilizer:
=> Electrical system; Repair group 96; Servicing electronic immobilizer
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Note to fault code 17978:
If starting is attempted with an unauthorised key a permanent fault will be stored. After a subsequent start with an authorised key the fault will be converted to a sporadic fault.
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