AUDI A6 1998 C5 / 2.G ATQ Engine Check DTC Memory And Erase DTC Memory User Guide

01-22

DTC
DTC text
Corrective action
SAE
VAG


P0150 16534 Bank 2, sensor 1
Electrical malfunction in
circuit
1) - Testing Oxygen Sensor (O2S) and oxygen sensor control before Three Way
Catalytic Converter (TWC) Page 24
-76

P0151 16535 Bank 2, sensor 1
Voltage too low
1)
P0152 16536 Bank 2, sensor 1
Voltage too high 1)
P0153 16537 Bank 2, sensor 1
Signal too slow
1)
P0154 16538 Bank 2, sensor 1
No activity
1)
1) For these malfunctions, ECM does not switch on the Malfunction Indicator Lamp (MIL) unless malfunction is recognized
again after another engine start. Meaning of Malfunction Indicator Lamp (MIL) Page 01
-3 .
Pa
ge 11 of 52 Check DTC Memor
y (function 02
) and Erase DTC Memor
y (function 05
)
11/23/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.FU05.01.2

01-23

DTC
DTC text
Corrective action
SAE
VAG


P0156 16540 Bank 2, sensor 2
Electrical malfunction in
circuit
1) - Testing Oxygen Sensor (O2S) and oxygen sensor control behind Three Way
Catalytic Converter (TWC) Page 24
-97

P0157 16541 Bank 2, sensor 2
Voltage too low
1)
P0158 16542 Bank 2, sensor 2
Voltage too high 1)
P0159 16543 Bank 2, sensor 2
Signal too slow
1)
P0160 16544 Bank 2, sensor 2
No activity
1)
P0219 16603 Maximum engine speed
exceeded - Repair mechanical damage
1) For these malfunctions, ECM does not switch on the Malfunction Indicator Lamp (MIL) unless malfunction is recognized
again after another engine start. Meaning of Malfunction Indicator Lamp (MIL) Page 01
-3 .
Pa
ge 12 of 52 Check DTC Memor
y (function 02
) and Erase DTC Memor
y (function 05
)
11/23/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.FU05.01.2

01-24

DTC
DTC text
Corrective action
SAE
VAG


P0300 16684
Combustion misfire detected
1)
- Check fuel pressure Page 24
-30
- Test fuel injectors Page 24
-36
P0301 16685
Cyl. 1 combustion misfire detected
1)
- Check spark plugs and ignition wires with connector
P0302 16686
Cyl. 2 combustion misfire detected 1)
- Check ignition coils Page 28
-7
P0303 16687
Cyl. 3 combustion misfire detected
1)
- Check ignition coils Page 28
-10
P0304 16688
Cyl. 4 combustion misfire detected
1)
- Check misfire recognition Page 28
-52
P0305 16689
Cyl. 5 combustion misfire detected
1)
- Fill fuel tank with fuel
P0306 16690
Cyl. 6 combustion misfire detected 1)

1) For these malfunctions, ECM does not switch on the Malfunction Indicator Lamp (MIL) unless malfunction is recognized
again after another engine start. Meaning of Malfunction Indicator Lamp (MIL) Page 01
-3 .
Pa
ge 13 of 52 Check DTC Memor
y (function 02
) and Erase DTC Memor
y (function 05
)
11/23/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.FU05.01.2

01-25

DTC
DTC text
Corrective action
SAE
VAG


P0321 16705 Engine Speed (RPM) sensor -G28-
Implausible signal
1) - Check sender for fuel gauge Page 28
-19
P0322 16706 Engine Speed (RPM) sensor -G28-
No signal
1)
P0327 16711 Knock Sensor (KS) 1 -G61-
Signal too small - Check knock sensor Page 28
-41
P0328 16712 Knock Sensor (KS) 1 -G61-
Signal too large
P0332 16716 Knock Sensor (KS) 2 -G66-
Signal too small
P0333 16717 Knock Sensor (KS) 2 -G66-
Signal too large
P0341 16725 Camshaft Position (CMP) sensor -G40-
Implausible signal
1)
- Check Camshaft Position (CMP) sensor Page 28
-45
P0346 16730 Camshaft Position (CMP) sensor -G163-

Implausible signal
1)

1) For these malfunctions, ECM does not switch on the Malfunction Indicator Lamp (MIL) unless malfunction is recognized
again after another engine start. Meaning of Malfunction Indicator Lamp (MIL) Page 01
-3 .
Pa
ge 14 of 52 Check DTC Memor
y (function 02
) and Erase DTC Memor
y (function 05
)
11/23/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.FU05.01.2

01-26

DTC
DTC text
Corrective action
SAE
VAG


P0420 16804 Catalytic converter
system, bank 1,
Not effective enough
1)
Repair Manual, Engine Mechanical, Repair Group 26; Exhaust system
components, removing and installing - Generate readiness code Page 01
-82
. If the same malfunction is indicated
again, replace primary catalytic converter, bank 1.
P0421 16805 Primary catalytic
converter, bank 1,
Not effective enough
1)
Repair Manual, Engine Mechanical, Repair Group 26; Exhaust system
components, removing and installing - Generate readiness code Page 01
-82
. If the same malfunction is indicated
again, replace primary catalytic converter, bank 1.
1) For these malfunctions, ECM does not switch on the Malfunction Indicator Lamp (MIL) unless malfunction is recognized
again after another engine start. Meaning of Malfunction Indicator Lamp (MIL) Page 01
-3 .
Important note:
The primary catalytic converters are located between the oxygen sensors of the appropriate cylinder bank. They are not
immediately visible after vehicle is raised; they are the two, slightly smaller catalytic converters located closer to the engine.
Pa
ge 15 of 52 Check DTC Memor
y (function 02
) and Erase DTC Memor
y (function 05
)
11/23/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.FU05.01.2

01-27

DTC
DTC text
Corrective action
SAE
VAG


P0430 16814 Catalytic converter
system, bank 2,
Not effective enough
1)
Repair Manual, Engine Mechanical, Repair Group 26; Exhaust system
components, removing and installing - Generate readiness code Page 01
-82
. If the same malfunction is indicated
again, replace primary catalytic converter, bank 2.
P0431 16815 Primary catalytic
converter, bank 2,
Not effective enough
1)
Repair Manual, Engine Mechanical, Repair Group 26; Exhaust system
components, removing and installing - Generate readiness code Page 01
-82
. If the same malfunction is indicated
again, replace primary catalytic converter, bank 2.
1) For these malfunctions, ECM does not switch on the Malfunction Indicator Lamp (MIL) unless malfunction is recognized
again after another engine start. Meaning of Malfunction Indicator Lamp (MIL) Page 01
-3 .
Important note:
The primary catalytic converters are located between the oxygen sensors of the appropriate cylinder bank. They are not
immediately visible after vehicle is raised; they are the two, slightly smaller catalytic converters located closer to the engine.
Pa
ge 16 of 52 Check DTC Memor
y (function 02
) and Erase DTC Memor
y (function 05
)
11/23/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.FU05.01.2

01-28

DTC
DTC text
Corrective action
SAE
VAG


P0441 16825 Tank ventilation
system
Throughput faulty
1) - Check Evaporative Emission (EVAP) Canister Purge Regulator Valve, perform
output Diagnostic Test Mode (DTM) Page 01
-56

P0442 16826 Tank ventilation
system
Small leak
detected
1) - Checking fuel supply and ventilation systems for leaks
P0455 16839 Tank ventilation
system
Large leak
detected 1) Repair Manual, Engine Mechanical, Repair Group 20; Evaporative Emissions
(EVAP) System Diagnosis using KLI9210 EVAP Tester, test EVAP system.
P0456 16840 Tank ventilation
system
Pinhole leak
detected
1) Repair Manual, Engine Mechanical, Repair Group 20; EVAP canister system
components, servicing; tank leak diagnostic, performing.
1) For these malfunctions, ECM does not switch on the Malfunction Indicator Lamp (MIL) unless malfunction is recognized
again after another engine start. Meaning of Malfunction Indicator Lamp (MIL) Page 01
-3 .
Pa
ge 17 of 52 Check DTC Memor
y (function 02
) and Erase DTC Memor
y (function 05
)
11/23/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.FU05.01.2

01-29

DTC
DTC text
Corrective action
SAE
VAG


P0501 16885 Vehicle speed signal
Implausible signal
1) - Check vehicle speed signal Page 24
-168
P0506 16890 Idle control
Engine speed below
specified value
1) - Checking throttle valve control module Page 24
-141
P0507 16891 Idle control
Engine speed above
specified value
1) - Check hose setup (intake manifold change-over valve and Secondary Air
Injection -AIR- solenoid valve); check intake system for leaks Page 24
-64

P0560 16944 Voltage supply
Implausible signal - Check voltage supply for control module Page 28
-30
P0562 16946 Voltage supply
Voltage too low

P0563 16947 Voltage supply
Voltage too high
1) For these malfunctions, ECM does not switch on the Malfunction Indicator Lamp (MIL) unless malfunction is recognized
again after another engine start. Meaning of Malfunction Indicator Lamp (MIL) Page 01
-3 .
Pa
ge 18 of 52 Check DTC Memor
y (function 02
) and Erase DTC Memor
y (function 05
)
11/23/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.FU05.01.2

01-30

DTC
DTC text
Corrective action
SAE
VAG


P0571 16955 Brake light switch -F-
Implausible signal - Check brake light switch and brake pedal switch Page 24
-178
P0601 16985
Control module faulty
1)
- replacing Engine Control Module (ECM) Page 24
-21
P0604 16988
Control module faulty
1)

P0605 16989
Control module faulty1)

P1102 17510 Bank 1, sensor 1, heating circuit
Short circuit to B+
1) - Check oxygen sensor heating Page 24
-116
P1105 17513 Bank 2, sensor 1, heating circuit
Short circuit to B+
1)
P1107 17515 Bank 2, sensor 1, heating circuit
Short circuit to B+1)

P1110 17518 Bank 2, sensor 2, heating circuit
Short circuit to B+1)

1) For these malfunctions, ECM does not switch on the Malfunction Indicator Lamp (MIL) unless malfunction is recognized
again after another engine start. Meaning of Malfunction Indicator Lamp (MIL) Page 01
-3 .
Pa
ge 19 of 52 Check DTC Memor
y (function 02
) and Erase DTC Memor
y (function 05
)
11/23/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.FU05.01.2

01-31

DTC
DTC text
Corrective action
SAE
VAG


P1111 17519 Oxygen sensor
control, bank 1
System too lean - Check oxygen sensor control before catalytic converter Page 24
-76
P1112 17520 Oxygen sensor
control, bank 1
System too rich
P1113 17521 Bank 1, sensor 1
Internal resistance too
large
1) - Next check signal wires for contact resistance => page Page 24
-90
; if there
are no contact resistances: Replace oxygen sensor
P1114 17522 Bank 2, sensor 1
Internal resistance too
large
1) - Next check signal wires for contact resistance => page Page 24
-112
; if there
are no contact resistances: Replace oxygen sensor
1) For these malfunctions, ECM does not switch on the Malfunction Indicator Lamp (MIL) unless malfunction is recognized
again after another engine start. Meaning of Malfunction Indicator Lamp (MIL) Page 01
-3 .
Pa
ge 20 of 52 Check DTC Memor
y (function 02
) and Erase DTC Memor
y (function 05
)
11/23/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.FU05.01.2