check engine AUDI A6 1998 C5 / 2.G AEB Engine OBD and DTC

01-26

Diagnostic Trouble
Code (DTC)
Malfunction text
MIL
Corrective action
SAE
VAG



P1128 17536 Long Term Fuel Trim
mult., Bank1
System too Lean
1)
2
Dcy - Check HO2S -G39- and O2S control Page 24
-17

- Check Oxygen Sensor (O2S) behind Three Way Catalytic
Converter (TWC) -G130- Page 24
-35


- Check fuel pressure regulator and residual fuel pressure
Page 24
-93


- Check fuel injectors Page 24
-87
- Output Diagnostic Test Mode (DTM) Page 01
-42

- Check EVAP canister purge regulator valve output
Diagnostic Test Mode (DTM), page Page 01
-42

1) The term "mult." = multiplicative; applies to entire engine speed (RPM) and load range.
Pa
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01-27

Diagnostic Trouble Code
(DTC)
Malfunction text
MIL
Corrective action
SAE
VAG



P1136 17544 Long Term Fuel Trim Add.
Fuel, Bank1
System too Lean
2)
2
Dcy - Check intake air system for leaks ("false air")
Page 24
-97


- Check HO2S -G39- and O2S control Page 24
-17

- Check Mass Air Flow (MAF) sensor -G70- Page
24
-57


- Check fuel pressure regulator and residual fuel
pressure Page 24
-93


- Check fuel injectors Page 24
-87
- Output Diagnostic Test Mode (DTM) Page 01
-42
2) The term "Add." = additive; applies only with engine running at idle speed.
Pa
ge 40 of 57 On Board Dia
gnostic
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)
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01-28

Diagnostic Trouble
Code (DTC)
Malfunction text
MIL
Corrective action
SAE
VAG



P1137 17545 Long Term Fuel Trim Add.
Fuel, Bank1
System too Rich
2)
2 Dcy
- Check HO2S -G39- and O2S control Page 24
-17

- Check fuel pressure regulator and residual pressure
Page 24
-93


Repair Manual, 1.8 Liter 4
-Cyl. 5V Turbo Engine
Mechanical, Engine Code(s): AEB, ATW, Repair Group 26.
- Check exhaust system for leakage:
P1171 17579 Throttle Actuation
Potentiometer Signal 2
Range/Performance
1)
Immed.
- Check throttle actuation potentiometer Page 24
-
107
.
1) With this malfunction the exhaust Malfunction Indicator Light (MIL) is switched on by the ECM, immediately after the
malfunction has been recognized. Significance of MIL Page 01
-2 .
2) The term "Add." = additive; applies only with engine running at idle speed.
Pa
ge 41 of 57 On Board Dia
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01-31

Diagnostic Trouble
Code (DTC)
Malfunction text
MIL
Corrective action
SAE
VAG



P1250 17658 Fuel Level
Too Low Off
- Fuel volume less than 2 gallons, add fuel.

Electrical Wiring Diagrams, Troubleshooting & Component
Locations - Check wiring between ECM and instrument cluster

Repair Manual, Electrical Equipment, Repair Group 01
- Check signal from fuel gauge, and fuel gauge
P1297 17705 Connection charger-
throttle valvle
Pressure drop
Repair Manual, 1.8 Liter 4
-Cyl. 5V Turbo Engine Mechanical,
Engine Code(s): AWM, Repair Group 21; Charge Pressure, Leak test with VAG 1687
- Check air pressure system using VAG 1687 charge air system
tester
Note on misfire malfunctions:
For malfunctions that may be caused by low fuel volume (i.e. combustion misfire) a low-fuel malfunction (DTC "P1250") is also
stored when there is less than 2 gallons of fuel remaining in the tank.
Pa
ge 46 of 57 On Board Dia
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01-36

Diagnostic Trouble
Code (DTC)
Malfunction
text
MIL
Corrective action
SAE
VAG



P1555 17963 Charge Pressure

Upper Limit
Exceeded Off
Repair Manual, 1.8 Liter 4
-Cyl. 5V Turbo Engine Mechanical, Engine
Code(s): AEB, ATW, Repair Group 21

Repair Manual, 1.8 Liter 4
-Cyl. 5V Turbo Engine Mechanical, Engine
Code(s): AWM, Repair Group 21; Charge Pressure, Leak test with VAG 1687
- Check intake air boost (charge pressure)
- Check intake air boost (charge pressure) regulation Page 24
-123
- Check air pressure system using VAG 1687 charge air system tester
P1556 17964 Charge Pressure

Negative
Deviation
P1557 17965 Charge Pressure

Positive
Deviation
P1558 17966 Throttle Actuator

Electrical 2
Dcy - Check throttle body and throttle valve control module Page 24
-99
Pa
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01-37

Diagnostic Trouble
Code (DTC)
Malfunction text
MIL
Corrective action
SAE
VAG



P1559 17967 Idle Speed Contr. Throttle Pos.
Adaptation Malfunction
(Adaptation of throttle valve control module -J338- to Motronic
ECM has been interrupted, e.g. the accelerator pedal was
depressed or the engine was started during throttle valve control
module adjustment) Off
- Check throttle body and
throttle valve control module
Page 24
-99

P1560 17968 Maximum Engine Speed Exceeded Off
- Carry out engine
mechanical repairs as
necessary
P1564 17972 Idle Speed Contr. Throttle Pos.
Low Voltage During Adaptation
(Voltage less than 10 volts during adaptation of throttle valve
control module -J338-) Off
- Check throttle valve control
module power supply
voltage Page 24
-101

P1602 18010 Power Supply (B+) Terminal 30
Low Voltage Off
- Check Engine Control
Module (ECM) power supply
Page 24
-77

P1606 18014 Rough Road Spec Engine Torque ABS-ECU
Electrical Malfunction Off
- Check ABS control module
signal for rough road
recognition Page 24
-161

Pa
ge 55 of 57 On Board Dia
gnostic
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)
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e=re
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