fuel pressure AUDI A4 1998 B5 / 1.G AEB Engine OBD and DTC
[x] Cancel search | Manufacturer: AUDI, Model Year: 1998, Model line: A4, Model: AUDI A4 1998 B5 / 1.GPages: 57, PDF Size: 0.2 MB
Page 38 of 57

01-25
Diagnostic Trouble
Code (DTC)
Malfunction text
MIL
Corrective action
SAE
VAG
P1127 17535 Long Term Fuel Trim
mult., Bank1
System too Rich
1)
2
Dcy - Check Mass Air Flow (MAF) sensor -G70- Page 24
-57
- 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
1) The term "mult." = multiplicative; applies to entire engine speed (RPM) and load range.
Pa
ge 38 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
Page 39 of 57

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
Page 40 of 57

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
Page 41 of 57

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
Page 46 of 57

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