1999 AUDI A8 fuel

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
ge 39 of 57 On Board Dia
gnostic
(OBD
)
11/19/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.FU02.01.1

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
(OBD
)
11/19/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.FU02.01.1

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
gnostic
(OBD
)
11/19/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.FU02.01.1

01-29

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



P1176 17584 O2 Correction Behind Catalyst,
B1
Limit Attained 2 Dcy
- Check intake air system for leaks ("false air")
Page 24
-97


- Check Heated Oxygen Sensor (HO2S) aging
Page 24
-51


- Check Oxygen Sensor (O2S) heater -Z29-
Page 24
-43


- Check O2S behind TWC Page 24
-35
P1196 17604 O2 Sensor Heater Circ., Bank1-
Sensor1
Electrical Malfunction 2 Dcy
- Check Oxygen Sensor (O2S) heater -Z19-
Page 24
-27

P1198 17606 O2 Sensor Heater Circ., Bank1-
Sensor2
Electrical Malfunction
- Check Oxygen Sensor (O2S) heater -Z29-
Page 24
-43

P1213 17621 Cyl.1-Fuel Inj. Circ.
Short to B+ Immed.
- Check fuel injectors Page 24
-87
- Output Diagnostic Test Mode (DTM) Page 01
-42

P1214 17622 Cyl.2-Fuel Inj. Circ.
Pa
ge 42 of 57 On Board Dia
gnostic
(OBD
)
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p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.FU02.01.1

01-30

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



P1215 17623 Cyl.3-Fuel Inj. Circ.
Short to B+ Immed.
- Check fuel injectors Page 24
-87
- Output Diagnostic Test Mode (DTM) Page 01
-42
P1216 17624 Cyl.4-Fuel Inj. Circ.
Short to B+
P1225 17633 Cyl.1-Fuel Inj. Circ.
Short to Ground
P1226 17634 Cyl.2-Fuel Inj. Circ.
Short to Ground
P1227 17635 Cyl.3-Fuel Inj. Circ.
Short to Ground
P1228 17636 Cyl.4-Fuel Inj. Circ.
Short to Ground
P1237 17645 Cyl.1-Fuel Inj. Circ.
Open Circuit
P1238 17646 Cyl.2-Fuel Inj. Circ.
Open Circuit
Pa
ge 44 of 57 On Board Dia
gnostic
(OBD
)
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e=re
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P1239 17647 Cyl.3-Fuel Inj. Circ.
Open Circuit
P1240 17648 Cyl.4-Fuel Inj. Circ.
Open Circuit
Pa
ge 45 of 57 On Board Dia
gnostic
(OBD
)
11/19/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.FU02.01.1

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
gnostic
(OBD
)
11/19/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.FU02.01.1

01-34

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



P1500 17908 Fuel Pump Relay Circ.
Electrical Malfunction Immed.
- Check fuel pump relay and relay actuation Page 24
-81

P1501 17909 Fuel Pump Relay Circ.
Short to Ground
P1502 17910 Fuel Pump Relay Circ.
Short to B+
P1505 17913 Closed Throttle Pos. Switch

Does Not Close/Open Circ. 2 Dcy
- Check throttle body and throttle valve control
module Page 24
-99

P1506 17914 Closed Throttle Pos. Switch

Does Not Open/Short to
Ground
P1543 17951 Throttle Actuation
Potentiometer
Signal too Low Immed.
P1544 17952 Throttle Actuation
Potentiometer
Pa
ge 50 of 57 On Board Dia
gnostic
(OBD
)
11/19/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.FU02.01.1