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Fault table: Fault codes 01235 ... 18259
Fault table: Fault codes 01235 ... 18259
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V.A.G 1551 print-out
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Possible fault cause
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Fault elimination
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01235
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Secondary air inlet valve
-N112
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Short to positive
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N112 defective
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- Check N112
, final control diagnosis
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Wiring has short to positive
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- If necessary replace N112:
=> Repair group 26; Removing and installing parts of secondary air system
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Open circuit/short to earth
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N112 defective
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Wiring open circuit/short to earth
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V.A.G 1551 print-out
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Possible fault cause
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Fault elimination
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01243
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Twin path intake manifold change-over valve -N156
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Short to earth
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Wiring has short to earth
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- Perform final control diagnosis
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Short to positive
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Wiring has short to positive
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- Check twin path intake manifold change-over
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Open circuit
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Wiring open circuit
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V.A.G 1551 print-out
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Possible fault cause
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Fault elimination
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01247
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Activated charcoal filter solenoid valve 1 -N80
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Short to positive
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N80 defective
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- Check N80
=> Page 01-86
, final control diagnosis
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Wiring or N80 has short to positive
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Open circuit/short to earth
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N80 defective
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Wiring open circuit or short to earth
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- Renew N80:
=> Repair group 20; Removing and installing parts of fuel supply system; servicing parts of activated charcoal filter system
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Defective
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N80 defective
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V.A.G 1551 print-out
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Possible fault cause
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Fault elimination
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01249
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Injector Cyl. 1 -N30
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Short to positive
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Wiring or N30 has short to positive
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- Check injectors
=> Page 01-86
, final control diagnosis
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- Check injector wiring => Page 24-65
, checking injectors
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Open circuit/short to earth
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Wiring open circuit/short to earth
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- Check injectors
=> Page 01-86
, final control diagnosis
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- Check injector wiring => Page 24-65
, checking injectors
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N30 defective
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- If necessary replace appropriate injector => Page 24-61
, removing and installing injectors
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V.A.G 1551 print-out
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Possible fault cause
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Fault elimination
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01250
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Injector Cyl. 2 -N31
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Short to positive
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- => Injector Cyl. 1,
Fault code 01249
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- => Injector Cyl. 1,
Fault code 01249
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Open circuit/short to earth
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01251
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Injector Cyl. 3 -N32
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Short to positive
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- => Injector Cyl. 1,
Fault code 01249
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- => Injector Cyl. 1,
Fault code 01249
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Open circuit/short to earth
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V.A.G 1551 print-out
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Possible fault cause
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Fault elimination
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01252
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Injector Cyl. 4 -N33
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Short to positive
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- => Injector Cyl. 1,
Fault code 01249
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- => Injector Cyl 1,
Fault code 01249
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Open circuit/short to earth
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01253
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Injector Cyl. 5 -N83
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Short to positive
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- => Injector Cyl. 1,
Fault code 01249
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- => Injector Cyl. 1,
Fault code 01249
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Open circuit/short to earth
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V.A.G 1551 print-out
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Possible fault cause
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Fault elimination
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01259
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Fuel pump relay -J17
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Short to positive
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Wire has short to positive
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- Locate and eliminate short using current flow diagram:
=> Current flow diagrams, Electrical fault finding and Fitting locations binder
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J17 defective
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- If necessary replace J17:
=> Current flow diagrams, Electrical fault finding and Fitting locations binder
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Open circuit/short to earth
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Wiring open circuit/short to earth
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- Locate and eliminate short using current flow diagram:
=> Current flow diagrams, Electrical fault finding and Fitting locations binder
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Note on fault code 01259:
If the fault "01259" is stored the faults "01247 and 01249...01254 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 fault cause
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Fault elimination
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01314
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Engine control unit
No communication
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- Fault in data wiring to control unit for ABS and EDL or automatic gearbox control unit
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- Check data wiring with test box V.A.G 1598/22 between sockets 29 and 41 to engine control unit
=> Current flow diagrams, Electrical fault finding and Fitting locations binder
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16891
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Idling control
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Speed above specification
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Unmetered air between throttle valve control part (J338) and engine
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- Check intake system for leaks
(unmetered air) => Page 24-84
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V.A.G 1551 print-out
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Possible fault cause
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Fault elimination
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17923
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Twin path intake manifold change-over valve -N156
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Short to earth
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Wiring has short to earth
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- Perform final control diagnosis
Locate and eliminate short using current flow diagram:
=> Current flow diagrams, Electrical fault finding and Fitting locations binder
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17924
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Twin path intake manifold change-over valve -N156
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Open circuit
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Wiring open circuit
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- Perform final control diagnosis
Locate and eliminate wiring open circuit using current flow diagram:
=> 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 fault cause
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Fault elimination
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17973
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Throttle valve control part -J338
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Lower stop not reached
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Throttle cable incorrectly adjusted
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- Check throttle cable adjustment:
=> Repair group 20; Removing and installing parts of fuel supply system; Servicing accelerator mechanism;
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Throttle cable sticking or soiled
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- Check throttle valve for damage or soiling
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Motronic control unit (J220) has not recognised throttle valve control part basic setting (J338)
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- Perform basic setting
=> Page 24-109
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V.A.G 1551 print-out
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Possible fault cause
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Fault elimination
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17978
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Engine control unit blocked
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Attempted manipulation
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- Match the engine electronic control unit to the electronic immobilizer
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Short in communication wire
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- Check electronic immobilizer:
=> Electrical system; Repair group 96;
=> Servicing electronic immobilizer
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Incorrect coding
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Immobilizer control unit defective/not fitted
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Note to fault code 17978:
The control electronics for the immobilizer are located inside the dash panel insert and cannot be replaced separately.
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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V.A.G 1551 print-out
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Possible fault cause
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Fault elimination
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18020
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Engine control unit incorrectly coded
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- Engine control unit incorrectly coded
- Data wire to gearbox control unit faulty
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- Coding engine control unit
=> Page 24-106
Check data wiring using current flow diagram for open circuit or short
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18034
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CAN Bus
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Fault in communication from gearbox control unit
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- Fault in data wiring to gearbox control unit
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- Check data wiring using current flow diagram for open circuit or short
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18259
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CAN Bus
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Fault in communication from ABS control unit
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- Fault in data wiring to ABS control unit
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- Check data wiring using current flow diagram for open circuit or short
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