AUDI A6 1999 C5 / 2.G ATW Engine Diagnostic Trouble Code Table User Guide
Manufacturer: AUDI, Model Year: 1999, Model line: A6, Model: AUDI A6 1999 C5 / 2.GPages: 40, PDF Size: 0.12 MB
Page 11 of 40

01-25
 
DTC  
DTC text  
Corrective action  
SAE  
VAG  
  
  
P0411   16795   Secondary air system 
Throughput faulty  
 Repair Manual, 1.8 Liter 4
-Cyl. 5V Turbo Engine Mechanical, Engine Code(s): 
AEB, ATW, Repair Group 26; Checking Secondary Air Injection (AIR) system
    - Check combination valve.
- Check hose setup (Secondary Air Injection -AIR- solenoid valve); check intake 
system for leaks (false air)   Page 24
-68
 
P0422   16806   Bank 1, main catalytic 
converter  
Not effective enough  
 Repair Manual, 1.8 Liter 4
-Cyl. 5V Turbo Engine Mechanical, Engine 1.8 Liter 
4-Cyl. 5V Turbo Engine Mechanical, Engine Code(s): AEB, ATW, Repair Group 
26
    - Generate readiness code   Page 01
-73
 . If the same malfunction is indicated 
again, replace catalytic converter. 
P0441   16825   Tank ventilation system  
Throughput faulty  - Check Evaporative Emission (EVAP) canister purge regulator valve   Page 
24
-107
 
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Page 12 of 40

01-26
 
DTC  
DTC text  
Corrective action  
P0442   16826   Tank ventilation 
system  
Small leak 
detected  - Checking fuel supply and ventilation systems for leaks
P0455   16839   Tank ventilation 
system  
Large leak 
detected   Repair Manual, Fuel Supply System, Repair Group 20; Fuel supply; EVAP canister 
system components, servicing; tank leak diagnostic, performing.
   
P0456   16840   Tank ventilation 
system  
Pinhole leak 
detected   Repair Manual, Fuel Supply System, Repair Group 20
    - Checking EVAP system for leaks using KLI9210 EVAP tester
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Page 13 of 40

01-27
 
DTC  
DTC text  
Corrective action  
SAE  
VAG  
  
  
P0501   16885   Vehicle speed signal   
Implausible signal  - Checking Vehicle Speed Signal (VSS)   Page 24
-157
P0506   16890   Idle control RPM below 
specified value  - Check throttle valve control module   Page 24
-120
P0507   16891   Idle control RPM above 
specified value  - Check hose setup (Secondary Air Injection -AIR- solenoid valve); check 
intake system for leaks (false air)   Page 24
-68
 
P0560   16944   Voltage supply  
Implausible signal  - Check voltage supply for control module   Page 28
-36
P0562   16946   Voltage supply  
Voltage too low    
  
P0563   16947   Voltage supply  
Voltage too high    
  
P0571   16955  
Brake light switch -F-
 1)
  
Implausible signal  - Check brake light switch and brake pedal switch   Page 24
-143
1) Brake pedal switch -F47- is monitored in addition to brake light switch -F-.  
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Page 14 of 40

01-28
 
DTC  
DTC text  
Corrective action  
SAE  
VAG  
  
  
P0601   16985   Control module faulty  
- Replacing Engine Control Module (ECM)   Page 24
-23
P0604   16988   Control module faulty    
P0605   16989   Control module faulty    
P0685   17069   Main relay -J271-  
Open circuit  - Check motronic Engine Control Module (ECM) power supply relay -J271- 
 Page 28
-13
 
P1102   17510   Bank 1, sensor 1, heating 
circuit  
Short circuit to B+  - Check oxygen sensor heating   Page 24
-99
P1105   17513   Bank 1, sensor 2, heating 
circuit  
Short circuit to B+    
P1111   17519   Oxygen sensor control, 
bank 1  
System too lean  - Check oxygen sensor control behind catalytic converter   Page 24
-71
P1112   17520   Oxygen sensor control, 
bank 1  
System too rich    
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Page 15 of 40

01-29
 
DTC  
DTC text  
Corrective action  
SAE  
VAG  
  
  
P1113   17521   Bank 1, sensor 1  
Internal resistance too high  - Check oxygen sensor heating   Page 24
-99
P1114   17522   Bank 1, sensor 2  
Internal resistance too high    
P1115   17523   Bank 1, sensor 1, heating circuit  
Short circuit to Ground (GND)    
P1116   17524   Bank 1, sensor 1, heating circuit  
Open circuit    
  
P1117   17525   Bank 1, sensor 2, heating circuit  
Short circuit to Ground (GND)    
P1118   17526   Bank 1, sensor 2, heating circuit  
Open circuit    
  
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Page 16 of 40

01-30
 
DTC  
DTC text  
Corrective action  
SAE  
VAG  
  
  
P1127   17535   Bank 1, mixture adaptation (mult.)  
System too rich  - Road test vehicle (fuel in oil).
- Check fuel system pressure   Page 24
-33
- Check Mass Air Flow (MAF) sensor   Page 24
-60
- Check intake system for leaks (false air)   Page 24
-68
P1128   17536   Bank 1, mixture adaptation (mult.)  
System too lean  - Check oxygen sensor before catalytic converter   Page 24
-71
- Check oxygen sensor behind catalytic converter   Page 24
-87
- Check fuel injectors   Page 24
-38
 .
Note:  
mult. = multiplicative, means that malfunction is valid across entire range of engine speed and engine load. 
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Page 17 of 40

01-31
 
DTC  
DTC text  
Corrective action  
SAE  
VAG  
  
  
P1136   17544   Bank 1, mixture adaptation 
(add.)  
System too lean  - Road test vehicle (fuel in oil). 
- Check fuel system pressure   Page 24
-33
- Check Mass Air Flow (MAF) sensor   Page 24
-60
- Check intake system for leaks (false air)   Page 24
-68
P1137   17545   Bank 1, mixture adaptation 
(add.)  
System too rich  - Check oxygen sensor behind catalytic converter   Page 24
-87
- Check Evaporative Emission (EVAP) canister purge regulator valve   
Page 24
-107
 
Note:  
add = additive, means that malfunction is only valid at closed throttle (idle). 
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Page 18 of 40

01-32
 
DTC  
DTC text  
Corrective action  
SAE  
VAG  
  
  
P1149   17557   Oxygen sensor control, bank 1  
Unplausible control value  - Check oxygen sensor adaptation values and control 
 Page 24
-74
 
- Check fuel system pressure   Page 24
-33
- Check intake system for leaks (false air)   Page 24
-
68
 
P1171   17579   Angle sensor -2- for throttle drive (power 
accelerator actuation) -G188-  
Implausible signal  - Check angle sensor -1- for throttle drive   Page 24
-
127
 
P1172   17580   Angle sensor -2- for throttle drive (power 
accelerator actuation) -G188-  
Signal too small    
P1173   17581   Angle sensor -2- for throttle drive (power 
accelerator actuation) -G188-  
Signal too large    
  
P1176   17584   Bank 1 oxygen sensor correction behind catalytic 
converter Control limit reached  - Check oxygen sensor aging of oxygen sensor before 
catalytic converter   Page 24
-83
 
- Check oxygen sensor and oxygen sensor control 
behind catalytic converter   Page 24
-87
 
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Page 19 of 40

01-33
 
DTC  
DTC text  
Corrective action  
SAE  
VAG  
  
  
P1198   17606   Bank 1, sensor 2, heating circuit  
Electrical malfunction  - Check oxygen sensor heating   Page 24
-99
P1213   17621   Cylinder 1 fuel injector -N30-  
Short circuit to B+  - Check fuel injectors   Page 24
-38
 .
P1214   17622   Cylinder 2 fuel injector -N31-  
Short circuit to B+    
P1215   17623   Cylinder 3 fuel injector -N32-  
Short circuit to B+    
P1216   17624   Cylinder 4 fuel injector -N33-  
Short circuit to B+    
Pa
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Page 20 of 40

01-34
 DTC codes 17633 -18261
 
DTC  
DTC text  
Corrective action  
SAE  
VAG  
  
  
P1225   17633   Cylinder 1 fuel injector -N30-  
Short circuit to Ground (GND)
1)  - Check fuel injectors   Page 24
-38
 .
P1226   17634   Cylinder 2 fuel injector -N31-  
Short circuit to Ground (GND)
1)    
P1227   17635   Cylinder 3 fuel injector -N32-  
Short circuit to Ground (GND)1)    
P1228   17636   Cylinder 4 fuel injector -N33-  
Short circuit to Ground (GND)1)    
P1237   17645   Cylinder 1 fuel injector -N30-  
Open circuit    
P1238   17646   Cylinder 2 fuel injector -N31-  
Open circuit    
P1239   17647   Cylinder 3 fuel injector -N32-  
Open circuit    
P1240   17648   Cylinder 4 fuel injector -N33-    
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