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Interrogating and erasing fault memory
Fault codes 16485 - 17948
Note:
SAE-codes (e.g. P 0101) are listed in addition to the familiar V.A.G. fault codes with five digits. These P-codes do not have to be considered for the time being, they will be relevant for future generations of self-diagnosis systems.
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Display on VAS 5051
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Possible causes of fault
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Possible effects
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Fault remedy
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16485 P0101
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Air mass meter -G70
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Implausible signal
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- -G70 defective
- Open circuit in wiring or short circuit to earth
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- Reduced engine power
- Black smoke
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- Test -G70
=> Page 23-78
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- Dirt in air filter element
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- Change air filter element
=> Maintenance manual
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- Exhaust gas recirculation defective
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- Check EGR
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Display on VAS 5051
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Possible causes of fault
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Possible effects
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Fault remedy
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16685 P0301
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Cylinder 1
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Misfiring recognised
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- No combustion in cylinder
- No compression pressure
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- Reduced engine power
- Engine runs rough
- Increased emission figures
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- Test compression pressure
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- Unit injector defective
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- Test unit injector solenoid valves =>Page 23-20
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16686 P0302
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Cylinder 2
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Misfiring recognised
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- No combustion in cylinder
- No compression pressure
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- Reduced engine power
- Engine runs rough
- Increased emission figures
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- Test compression pressure
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- Unit injector defective
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- Test unit injector solenoid valves =>Page 23-20
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Display on VAS 5051
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Possible causes of fault
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Possible effects
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Fault remedy
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16687 P0303
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Cylinder 3
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Misfiring recognised
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- No combustion in cylinder
- No compression pressure
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- Reduced engine power
- Engine runs rough
- Increased emission figures
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- Test compression pressure
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- Unit injector defective
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- Test unit injector solenoid valves =>Page 23-20
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16688 P0304
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Cylinder 4
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Misfiring recognised
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- No combustion in cylinder
- No compression pressure
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- Reduced engine power
- Engine runs rough
- Increased emission figures
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- Test compression pressure
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- Unit injector defective
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- Test unit injector solenoid valves =>Page 23-20
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Display on VAS 5051
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Possible causes of fault
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Possible effects
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Fault remedy
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16705 P0321
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Engine speed sender -G28
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Implausible signal
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- -G28 defective
- Open circuit/short circuit in wiring
- Sender wheel on crankshaft loose
- Metal swarf on -G28
- -G28 loose
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- Engine stalls
- Engine runs rough
- Glow period warning lamp -K29 flashes
- Increased emission figures
- No display on rev. counter
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- Test -G28
=>Page 23-54
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16706 P0322
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Engine speed sender -G28
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No signal
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- -G28 defective
- Open circuit/short circuit in wiring
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- Engine will not start
- Engine stops
- Glow period warning lamp -K29 flashes
- No display on rev. counter
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- Test -G28
=>Page 23-54
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Display on VAS 5051
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Possible causes of fault
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Possible effects
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Fault remedy
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16725 P0341
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Camshaft position sensor => Sender -G40
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Implausible signal
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- -G40 defective
- Sender incorrect or incorrectly secured
- Gap between sender and sender wheel on camshaft not OK
- Open circuit in wiring or short to earth
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- Time to start engine is increased
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- Test -G40
=> Page 23-82
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- Sender wheel on camshaft damaged, turned out of position or loose
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- Engine will not start
- Engine stops
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- Check camshaft position and sender wheel position
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Display on VAS 5051
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Possible causes of fault
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Possible effects
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Fault remedy
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16885 P0501
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Road speed signal
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Implausible signal
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- No signal from speedometer sender -G22
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- Speedometer not OK
- No cruise control function
- No air conditioner function
- Vehicle jolts when changing gears
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- Test vehicle speed signal
=>Page 23-90
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Display on VAS 5051
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Possible causes of fault
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Possible effects
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Fault remedy
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16944 P0560
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Voltage supply
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Implausible signal
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- Current supply relay terminal 30 -J317 defective
- Relay sticks (sporadically)
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- Engine will not start
- Various running problems including engine cuts out
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- Test voltage supply for diesel direct injection system control unit
=>Page 23-45
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16946 P0562
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Voltage supply
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Voltage too low
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- Supply voltage below 4 V
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16947 P0563
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Voltage supply
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Voltage too high
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- Supply voltage above 20 V
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Display on VAS 5051
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Possible causes of fault
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Possible effects
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Fault remedy
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16955 P0571
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Brake light switch -F
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Implausible signal
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- Brake light switch -F or brake pedal switch -F47 defective
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- Glow period warning lamp -K29 flashes
- No brake light function
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- Test -F and -F47 => Page 23-63
Test brake lights
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16989 P0605
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Control unit defective
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- Internal fault in control unit
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- Engine running problems
- Engine cuts out
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- Renew control unit
=> Page 23-40
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17552 P1144
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Air mass meter -G70
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Open circuit/short to earth
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- -G70 defective
- Open circuit in wiring or short circuit to earth
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- Reduced engine power
- Black smoke
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- Test -G70
=> Page 23-78
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Display on VAS 5051
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Possible causes of fault
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Possible effects
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Fault remedy
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17553 P1145
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Air mass meter -G70
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Short to positive
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- -G70 defective
- Open circuit in wiring or short circuit to positive
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- Reduced engine power
- Black smoke
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- Test -G70
=> Page 23-78
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17554 P1146
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Air mass meter -G70
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Voltage supply
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- Operating voltage too high or too low
- Open circuit in wiring
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Display on VAS 5051
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Possible causes of fault
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Possible effects
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Fault remedy
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17563 P1155
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Intake manifold pressure sender -G71
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Short to positive
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- Short circuit to positive
- G71 defective
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- Reduced engine power
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- Test -G71
=>Page 23-56
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17564 P1156
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Intake manifold pressure sender -G71
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Open circuit/short to earth
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- Open circuit in wiring or short circuit to earth
- -G71 defective
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- Reduced engine power
- Increased emission figures
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17565 P1157
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Intake manifold pressure sender -G71
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Voltage supply
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- Open circuit/short circuit in wiring
- -G71 defective
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Display on VAS 5051
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Possible causes of fault
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Possible effects
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Fault remedy
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17568 P1160
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Intake manifold temperature sender -G72
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Short to earth
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- Wiring short to earth
- -G72 defective
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- Goes to preset value of 135.9 °C
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- Test -G72
=>Page 23-72
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17569 P1161
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Intake manifold temperature sender -G72
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Open circuit/short to positive
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- Open circuit in wiring or short circuit to positive
- -G72 defective
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Display on VAS 5051
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Possible causes of fault
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Possible effects
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Fault remedy
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17570 P1162
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Fuel temperature sender -G81
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Short to earth
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- Short circuit to earth
- -G81 defective
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- Increased emission figures
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- Test -G81
=> Page 23-75
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17571 P1163
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Fuel temperature sender -G81
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Open circuit/short to positive
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- Open circuit in wiring or short circuit to positive
- -G81 defective
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Display on VAS 5051
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Possible causes of fault
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Possible effects
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Fault remedy
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17663 P1255
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Coolant temperature sender -G62
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Short to earth
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- Short circuit to earth
- -G62 defective
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- Black smoke when starting
- Glow period is always approximately 20 seconds
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- Test -G62
=>Page 23-60
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17664 P1256
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Coolant temperature sender -G62
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Open circuit/short to positive
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- Open circuit in wiring or short circuit to positive
- -G62 defective
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Display on VAS 5051
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Possible causes of fault
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Possible effects
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Fault remedy
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17668 P1260
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Unit injector solenoid, valve, No. 1 cyl. -N240
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Implausible signal
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- No control of unit injector valve
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- Various running problems
- Engine runs rough
- Reduced engine power
- Increased emission figures
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- Test unit injector solenoid valves =>Page 23-20
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17669 P1261
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Unit injector solenoid, valve, No. 1 cyl. -N240
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Control limit surpassed
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- Control period too long
- Contact resistance
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17670 P1262
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Unit injector solenoid, valve, No. 1 cyl. -N240
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Control limit not reached
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- Control period too short
- Shortage of fuel
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- Air in fuel system
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- Check fuel supply system
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Display on VAS 5051
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Possible causes of fault
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Possible effects
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Fault remedy
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17671 P1263
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Unit injector solenoid valve, No. 2 cyl. -N241
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Implausible signal
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- No control of unit injector valve
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- Various running problems
- Engine runs rough
- Reduced engine power
- Increased emission figures
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- Test unit injector solenoid valves =>Page 23-20
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17672 P1264
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Unit injector solenoid valve, No. 2 cyl. -N241
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Control limit surpassed
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- Control period too long
- Contact resistance
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17673 P1265
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Unit injector solenoid valve, No. 2 cyl. -N241
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Control limit not reached
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- Control period too short
- Shortage of fuel
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- Air in fuel system
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- Check fuel supply system
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Display on VAS 5051
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Possible causes of fault
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Possible effects
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Fault remedy
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17674 P1266
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Unit injector solenoid valve, No. 3 cyl. -N242
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Implausible signal
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- No control of unit injector valve
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- Various running problems
- Engine runs rough
- Reduced engine power
- Increased emission figures
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- Test unit injector solenoid valves =>Page 23-20
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17675 P1267
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Unit injector solenoid valve, No. 3 cyl. -N242
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Control limit surpassed
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- Control period too long
- Contact resistance
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17676 P1268
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Unit injector solenoid valve, No. 3 cyl. -N242
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Control limit not reached
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- Control period too short
- Shortage of fuel
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- Air in fuel system
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- Check fuel supply system
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Display on VAS 5051
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Possible causes of fault
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Possible effects
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Fault remedy
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17677 P1269
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Unit injector solenoid valve, No. 4 cyl. -N243
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Implausible signal
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- No control of unit injector valve
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- Various running problems
- Engine runs rough
- Reduced engine power
- Increased emission figures
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- Test unit injector solenoid valves =>Page 23-20
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17678 P1270
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Unit injector solenoid valve, No. 4 cyl. -N243
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Control limit surpassed
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- Control period too long
- Contact resistance
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17679P1271
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Unit injector solenoid valve, No. 4 cyl. -N243
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Control limit not reached
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- Control period too short
- Shortage of fuel
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- Air in fuel system
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- Check fuel supply system
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Display on VAS 5051
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Possible causes of fault
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Possible effects
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Fault remedy
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17795 P1387
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Control unit defective
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- Internal fault in control unit
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- Engine running problems
- Engine cuts out
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- Renew control unit
=> Page 23-40
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17810 P1402
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Exhaust gas recirculation valve -N18
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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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- Test N18
=>Page 01-55, Final control diagnosis
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17849 P1441
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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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- Short to earth
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- Too much exhaust gas recirculation
- Reduced output, black smoke
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Display on VAS 5051
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Possible causes of fault
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Possible effects
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Fault remedy
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17910 P1502
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Fuel pump relay
-J17
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Short circuit to positive
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- Short circuit to positive
- -J17 defective
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- Engine cuts out
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- Test -J17
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17911 P1503
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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
- Open circuit in wiring
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- Additional heater element not working
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- Test alternator
=> Current flow diagrams, Electrical fault-finding and Fitting locations binder
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Display on VAS 5051
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Possible causes of fault
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Possible effects
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Fault remedy
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17931 P1523
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Crash signal from airbag control unit
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Implausible signal
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- Fault in data wire to airbag control unit
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- Test airbag systems
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17932 P1524
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Fuel pump relay
-J17
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Open circuit/short circuit to earth
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- Short circuit to earth
- -J17 defective
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- Engine cuts out
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- Test -J17
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Display on VAS 5051
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Possible causes of fault
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Possible effects
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Fault remedy
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17948 P1540
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Road speed signal
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Signal too high
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- Dash panel insert defective
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- Speedometer reading not OK
- No cruise control system function
- No air conditioner function
- Vehicle jolts when changing gears
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- Test speed signal
=>Page 23-90
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- Speedometer sender -G22 defective
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- Test speedometer sender -G22
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