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Fault memory
Fault table
Notes:
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◆ The fault table is listed in ascending order, according to the 5 digit V.A.G- fault code on the left.
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◆ Explanation of the fault types (e.g. "open circuit/short circuit to earth"):
=> Fault reader operating instructions
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◆ If components are indicated as faulty:
First check the wiring and connectors to these components as well as the system earth connections according to current flow diagram. This is particularly relevant if faults are output as "occurring sporadically" (SP).
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◆ Erase fault memory after rectifying faults.
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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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00513
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Engine speed sender -G28
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Implausible signal
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- G28 defective
- Gap speed sender/sender wheel too large
- Metal swarf on G28 or mounting loose
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- Glow plug warning lamp flashes
- Increased idling speed
- Poor starting
- Engine runs rough
- Reduced output
- No indication on rev-counter
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- Check G28
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No signal
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- G28 defective
- Wiring open or short circuit
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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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00519
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Intake manifold pressure sender -G71
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implausible signal
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- Charge pressure control solenoid valve (N75) defective
- Hose connections interchanged, not connected
- Intake manifold pressure sender (G71) defective
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- Reduced output
- Increased emission figures
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- Check N75
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Short to positive
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Short to earth
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Voltage supply
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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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00522
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Coolant temperature sender -G62
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Short to earth
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- G62 defective
- Wiring short to earth
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- Black exhaust when starting
- Engine pre-heating not operating
- Glow period always approx. 20 sec.
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- Check G62
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Open circuit/ short to positive
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- G62 defective
- Wiring open circuit or short to positive
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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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00523
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Intake air temperature sender -G42
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Short to earth
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- G42 defective
- Wiring has short to earth
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- Additional heater inoperative
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- Check G42
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Open circuit/short to positive
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- G42 defective
- Open circuit or short to positive
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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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00527
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Intake manifold temperature sender -G72
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Short to earth
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- G72 defective
- Wire has short to earth
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- Engine pre-heating not operating
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- Check G72
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Open circuit/short to positive
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- G72 defective
- Open circuit or short to positive
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00528
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Altitude sender -F961)
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Open circuit/short to earth
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- F96 defective
- Wiring open circuit or short to earth
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- Black exhaust at altitude
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- Check F96
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1)
Vehicles ▸ 07.94
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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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implausible signal
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- Current supply relay terminal 30 (J317) defective
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- Various running problems including engine will not start
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- Check current supply for Diesel direct injection system control unit
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00539
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Fuel temperature sender -G81
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Short to earth
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- G81 defective
- Wiring short to earth
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- Increased emission figures
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- Check G81
=> Page 23-68
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Open circuit/short to positive
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- G81 defective
- Wiring open circuit or short to positive
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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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00542
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Needle lift sender -G80
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Inlet open
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- G80 defective
- Wiring open or short circuit
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- Glow period warning lamp flashes
- Engine runs rough
- Reduced output
- Increased emission figures
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- Check G80
=> Page 23-77
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Open circuit/short to positive
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Short to earth
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Implausible signal
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- G80 defective
- Injection system wiring to 3rd cylinder not OK.
- Fuel shortage
- Air in fuel system
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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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00550
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Injection commencement regulation
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Control difference
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- Commencement of injection valve (N108) defective
- Needle lift sender (G80) defective
- Fuel tank empty
- Fuel supply not OK., fuel shortage
- Air in fuel system
- Start of delivery not OK
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- Engine runs rough
- Reduced output
- Poor cold start characteristics
- Increased emission figures
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- Check N108
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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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00553
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Air mass meter -G70
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Implausible signal
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- G70 defective
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- Reduced output
- Black exhaust
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- Check function of exhaust gas recirculation and air mass meter
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Open circuit/short to earth
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- G70 defective
- Wiring open circuit or short to earth
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Short to positive
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- G70 defective
- Wiring open circuit or short to positive
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Voltage supply
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- Wiring open or short circuit
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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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00575
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Intake manifold pressure
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Control difference
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- Solenoid valve for charge pressure control (N75) defective
- Hose connections interchanged, not connected
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- Reduced output
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- Check N75
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00625
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Speed signal
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implausible signal
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- No signal from speedometer (G21) or speedometer sender (G22)
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- Speedometer display not OK.
- Cruise control system switched off
- Vehicle jerks when changing gear
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- Check signal from G21 or G22
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Signal too large
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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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00626
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Glow period warning lamp -K29
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Open circuit/short to earth
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- Wiring open circuit
- Bulb defective
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- Glow period warning lamp not functioning
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- Check glow period warning lamp -K29
=> Current flow diagrams, Electrical fault finding and Fitting locations binder
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- Short to earth
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- Glow period warning lamp permanently on
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Short to positive
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- Short to positive
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- Glow period warning lamp not functioning
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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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00668
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Vehicle voltage
terminal 30
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Signal too small
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- Current supply relay terminal 30 (J317) defective
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- Engine will not start
- Various running problems including engine will not start
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- Check Diesel direct injection system control unit current supply
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Implausible signal
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00671
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CCS Switch -E45
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undefined switch position
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- E45 defective
- Wiring open/short circuit
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- Cruise control system switched off
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- Check cruise control system
=> Current flow diagrams, Electrical fault finding and Fitting locations binder
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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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00741
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Brake pedal monitoring
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implausible signal
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- Brake light switch (F) defective
- Brake pedal switch (F47) defective
- Both switch positions not synchronised
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- Glow plug warning lamp flashes
- Brake light defective
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- Check F and F47
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00765
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Modulating piston movement sender -G149
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- Injection pump defective
- Wiring open/short circuit
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- Glow period warning lamp flashes
- Various running problems
- Engine will not start
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- Check G149
=> Page 23-71
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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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00777
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Accelerator position sender -G79
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Implausible signal
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- G79 defective
- G79 incorrectly set
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- Glow plug warning lamp flashes
- Increased idling speed
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- Check G79
=> Page 23-21
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Short to positive
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- G79 defective
- Wiring short to positive
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Voltage supply
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- Wiring open or short circuit
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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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01028
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Fan relay -J323
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Open circuit/short to earth
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- Wiring open circuit
- Relay defective
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- Fan run-on not functioning
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- Check J323
, final control diagnosis
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- Short to earth
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- Fan runs permanently
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Short to positive
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- Short to positive
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- Fan run-on not functioning
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01044
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Control unit incorrectly coded
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- Invalid control unit coding
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- Code 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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01117
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Load signal for alternator terminal DF
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implausible signal
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- Alternator defective
- Voltage regulator defective
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- Engine pre-heating not operating
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- Check alternator
=> Current flow diagram, Electrical fault finding and Fitting locations binder
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01180
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Engine/air conditioner cut-off electrical connection
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Short to positive
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- Short in the wiring
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- Vehicle acceleration reduced, when air conditioner is switched on
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- Check air conditioner compressor cut-in
, final control diagnosis
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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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01193
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Low heat output relay -J359
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Open circuit/short to earth
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- Wiring open circuit
- Low heat output relay -J359 or high output relay -J360 defective
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- Engine pre-heating not functioning
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- Check J359 or J360
, final control diagnosis
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- Short to earth
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- Engine preheating permanently on
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Short to positive
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- Short to positive
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- Engine preheating not functioning
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01194
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High heat output relay -J360
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Short to positive
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- Wiring open circuit
- Short to positive
- High heat output relay -J360 defective
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- Engine preheating not functioning
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- Check J360
, Final control diagnosis
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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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01208
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Data1)
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changed
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- Fault in data
- Data manipulated
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- Vehicle no longer conforms to "Construction and use regulations"
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- Renew J248
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01237
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Fuel cut-off valve -N109
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Mechanical fault
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- N109 defective, leaking or sticking
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- Reduced output
- Engine will not start
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- Check N109
, Final control diagnosis
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Open/short circuit to earth
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- N109 defective
- Wiring open circuit/short to earth
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1)
Vehicles 08.95 ▸
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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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01242
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Control unit output stages
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Open/short to positive
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- All components activated by final control diagnosis
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- Various running problems
- Engine stops
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- Carry out final control diagnosis
Check wiring connections to control elements
Control unit defective if control elements OK.
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Implausible signal
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- Exhaust gas recirculation valve N18 defective
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- Increased emissions
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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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01262
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Charge pressure control solenoid valve -N75
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Open circuit/short to earth
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- Wiring open circuit
- Solenoid valve defective
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- Reduced output
- Charge pressure too low
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- Check N75
, Final control diagnosis
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- Short to earth
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- Reduced output
- Charge pressure too high
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Short to positive
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- Short to positive
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- Reduced output
- Charge pressure too low
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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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Open circuit/short to earth
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- Wiring open circuit
- Exhaust gas recirculation valve defective
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- No exhaust gas recirculation
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- Check N18
, Final control diagnosis
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- Short to earth
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- Too much exhaust gas recirculation
- Reduced output, black smoke
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Short to positive
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- Short to positive
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- No exhaust gas recirculation
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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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01266
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Glow plug relay -J52
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Open circuit/short to earth
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- Wiring open circuit
- Glow plug relay defective
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- Glow plug system not working
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- Check J52
, Final control diagnosis
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- Short to earth
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- Glow plug system permanently on
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Short to positive
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- Short to positive
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- Glow plug system not working
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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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01268
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Metering adjuster -N146
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Control difference
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- Injection pump defective
- Wiring open/short circuit
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- Glow period warning lamp flashes
- Various running problems
- Engine will not start
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- Check N146
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Lower limit value
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- Quantity adjuster incorrectly set
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- Black smoke
- Rough idling
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Upper limit value
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- Quantity adjuster incorrectly set
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- Jerking, poor performance
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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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01269
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Commencement of injection valve -N108
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Open circuit/short to earth
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- Wiring open circuit
- Commencement of injection valve defective
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- Engine knocks at idling, because commencement of injection is constantly "advanced"
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- Check N108
, Final control diagnosis
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- Short to earth
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- Poor performance, because commencement of injection is constantly "retarded"
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Short to positive
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- Short to positive
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- Engine knocks at idling, because commencement of injection is constantly "advanced"
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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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- Immobilizer control unit defective/missing
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- Engine will not start
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- Match engine electronic control unit to the electronic immobilizer => Page 23-124
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- Short in the communication wire
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- Check electronic immobilizer:
=> Repair group 96; Servicing electronic immobilizer
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- Incorrect coding
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- Attempted manipulation
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65535
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Control unit -J248 defective
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- Control unit internally defective
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- Various running problems
- Engine stops
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- Replace J248
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