1997 AUDI A4 sensor

01-25

DTC
Description of
malfunction
Corrective action
SAE
VAG


P0156 16540 02 Sensor Circ., Bank2-
Sensor2
Malfunction
2) - Check oxygen sensor heater Page 24
-114
P0157 16541 02 Sensor Circ., Bank2-
Sensor2
Low Voltage
2) - Check oxygen sensor signal wire and activation Page 24
-122
P0158 16542 02 Sensor Circ., Bank2-
Sensor2
High Voltage
2)
P0159 16543 02 Sensor Circ., Bank2-
Sensor2
Slow Response 2) - Check oxygen sensor and oxygen sensor control behind catalytic
converter Page 24
-100

P0160 16544 02 Sensor Circ., Bank2-
Sensor2
No Activity Detected
2) - Check oxygen sensor heater Page 24
-114
2) With this malfunction the exhaust Malfunction Indicator Light (MIL) is only switched on by the ECM, if the malfunction is
recognized after the engine has been restarted. Significance of MIL Page 01
-3 .
Pa
ge 29 of 166 Motronic s
ystem, On Board Dia
gnostic
(OBD
)
11/22/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.FU04.01.1

01-26

DTC
Description of
malfunction
Corrective action
SAE
VAG


P0236 16620 Charge air pressure
sensor -G31-
Implausible signal Repair Manual, 2.7 Liter V6 5V BiTurbo Engine Mechanical, Engine Code(s):
APB, Repair Group 21; Boost pressure system with turbocharger; charge air pressure sensor
-G31
-, checking

P0237 16621 Turbocharger Boost
Sensor (A) Circ
Low Input
2) Repair Manual, 2.7 Liter V6 5V BiTurbo Engine Mechanical, Repair Group 21;
Turbocharger; Checking Charge Air Pressure Sensor -G31
P0238 16622 Turbocharger Boost
Sensor (A) Circ
High Input
2)
2) With this malfunction the exhaust Malfunction Indicator Light (MIL) is only switched on by the ECM, if the malfunction is
recognized after the engine has been restarted. Significance of MIL Page 01
-3 .
Pa
ge 30 of 166 Motronic s
ystem, On Board Dia
gnostic
(OBD
)
11/22/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.FU04.01.1

01-28

DTC
Description of malfunction
Corrective action
SAE
VAG


P0321 16705 Ign./Distributor Eng. Speed Inp. Circ.
Range/Performance
2) - Check Engine Speed Sensor Page 28
-21
P0322 16706 Ign./Distributor Eng. Speed Inp. Circ.
No Signal
2)
P0327 16711 Knock Sensor 1 Circ.
Low Input - Check Knock Sensor Page 28
-41
P0328 16712 Knock Sensor 1 Circ.
High Input
P0332 16716 Knock Sensor 2 Circ.
Low Input
P0333 16717 Knock Sensor 2 Circ.
High Input
P0341 16725 Camshaft Pos. Sensor Circ.
Range/Performance
2) - Check Camshaft Position Sensor Page 28
-45
P0346 16730 Camshaft Pos. Sensor Circ. 2
Range/Performance
2)
Pa
ge 33 of 166 Motronic s
ystem, On Board Dia
gnostic
(OBD
)
11/22/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.FU04.01.1

01-29

DTC
Description of
malfunction
Corrective action
SAE
VAG


P0421 16805 Warm Up Catalyst,
Bank 1
Efficiency Below
Threshold
2) Repair Manual, 2.7 Liter V6 5V BiTurbo Engine Mechanical, Repair Group 26;
Components of Exhaust system removing and installing, Catalytic converter
removing and installing - Generate readiness code Page 01
-99
, if same DTC is displayed again, replace
warm up catalytic converter bank 1
P0431 16815 Warm Up Catalyst,
Bank 2
Efficiency Below
Threshold
2) Repair Manual, 2.7 Liter V6 5V BiTurbo Engine Mechanical, Repair Group 26;
Components of Exhaust system removing and installing, Catalytic converter
removing and installing - Generate readiness code Page 01
-99
, if same DTC is displayed again, replace
warm up catalytic converter bank 1
2) With this malfunction the exhaust Malfunction Indicator Light (MIL) is only switched on by the ECM, if the malfunction is
recognized after the engine has been restarted. Significance of MIL Page 01
-3 .
Important note:
The warm up catalytic converters are located between the two oxygen sensors of the relevant cylinder bank. The warm up
catalytic converters (little smaller than main catalytic converter) are located closer to the engine, not to be misunderstood with
the main catalysts you see immediately once the vehicle is lifted.
Pa
ge 35 of 166 Motronic s
ystem, On Board Dia
gnostic
(OBD
)
11/22/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.FU04.01.1

01-31

DTC
Description of
malfunction
Corrective action
SAE
VAG


P0501 16885 Vehicle Speed Sensor
Range/Performance
2) - Check Vehicle Speed Signal (VSS) Page 24
-182
P0506 16890 Idle Control System
RPM Lower than
Expected
2) - Carry out adaptation of Throttle Valve Control Module Page 24
-146
P0507 16891 Idle Control System
RPM Higher than
Expected
2) - Check for unmetered (false) air Page 24
-76
P0560 16944 System Voltage
Malfunction - Check control module voltage supply Page 28
-32
P0562 16946 System Voltage
Low Voltage

P0563 16947 System Voltage
High Voltage

P0571 16955 Cruise/Brake Switch (A)
Circ.
Incorrect Signal Repair Manual, Electrical Equipment, Repair Group 01, On Board
- Check brake light switch and/or brake pedal switch Page 24
-185
Pa
ge 37 of 166 Motronic s
ystem, On Board Dia
gnostic
(OBD
)
11/22/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.FU04.01.1

01-33

DTC
Description of malfunction
Corrective action
SAE
VAG


P1102 17510 O2 Sensor Heating Circ., Bank1-
Sensor1
Short to B+
2) - Check oxygen sensor heater Page 24
-114
P1105 17513 O2 Sensor Heating Circ., Bank1-
Sensor2
Short to B+
2)
P1107 17515 O2 Sensor Heating Circ., Bank2-
Sensor1
Short to B+ 2)
P1110 17518 O2 Sensor Heating Circ., Bank2-
Sensor2
Short to B+ 2)
P1111 17519 O2 Control (Bank 1)
System too lean - Check oxygen sensor adaptation values and oxygen sensor control
Page 24
-86

P1112 17520 O2 Bank 1
System too rich
2) With this malfunction the exhaust Malfunction Indicator Light (MIL) is only switched on by the ECM, if the malfunction is
recognized after the engine has been restarted. Significance of MIL Page 01
-3 .
Pa
ge 40 of 166 Motronic s
ystem, On Board Dia
gnostic
(OBD
)
11/22/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.FU04.01.1

01-34

DTC
Description of malfunction
Corrective action
SAE
VAG


P1113 17521 Bank1-Sensor1
Internal Resistance too High
2) - Check oxygen sensor heater Page 24
-114
P1114 17522 Bank1-Sensor2
Internal Resistance too High
2)
- Check oxygen sensor signal wire and activation Page 24
-
122

P1115 17523 O2 Sensor Heater Circ., Bank1-
Sensor1
Short to Ground
2) - Check oxygen sensor heater Page 24
-114
P1116 17524 O2 Sensor Heater Circ., Bank1-
Sensor1
Open
2)
P1117 17525 O2 Sensor Heater Circ., Bank1-
Sensor2
Short to Ground
2)
P1118 17526 O2 Sensor Heater Circ., Bank1-
Sensor2
Open
2)
2) With this malfunction the exhaust Malfunction Indicator Light (MIL) is only switched on by the ECM, if the malfunction is
Pa
ge 41 of 166 Motronic s
ystem, On Board Dia
gnostic
(OBD
)
11/22/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.FU04.01.1

01-35

DTC
Description of malfunction
Corrective action
SAE
VAG


P1119 17527 O2 Sensor Heater Circ., Bank2-Sensor1
Short to Ground
2) - Check oxygen sensor heater Page 24
-114
.
P1120 17528 O2 Sensor Heater Circ., Bank2-Sensor1
Open
2)
P1121 17529 O2 Sensor Heater Circ., Bank2-Sensor2
Short to Ground
2)

P1122 17530 O2 Sensor Heater Circ., Bank2-Sensor2
Open
2)

2) With this malfunction the exhaust Malfunction Indicator Light (MIL) is only switched on by the ECM, if the malfunction is
recognized after the engine has been restarted. Significance of MIL Page 01
-3 .
Pa
ge 43 of 166 Motronic s
ystem, On Board Dia
gnostic
(OBD
)
11/22/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.FU04.01.1