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Autodata - Diagnostic Trouble Codes Fault locations and probable causes - 2004 edition

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Model: A2 A363 80 1,612,0/2,6/2,8 80 1,9 TDI (07193 -) A41S4<br />

1001A6 1,812,012,612,814,2 A6 2,s TDI A6IS6IAllroad A8lS8<br />

CoupelCabriolet 1,8/2,012,6/2,8 Cabriolet 1,9 TDI TT<br />

VAG type<br />

5-digit<br />

I EOBD type<br />

<strong>Fault</strong> location<br />

Probable cause<br />

Fuel pressure - mechanical fault<br />

Air in fuel system, fuel leak, fuel lift pump, fuel<br />

bypass valve, fuel pressure control valve, high<br />

pressure fuel pump<br />

Fuel pressure - system deviation<br />

Air in fuel system, fuel leak, fuel lift pump, fuel<br />

bypass valve, fuel pressure control valve, high<br />

pressure fuel pump<br />

lntake manifold air control solenoid - short<br />

to positive<br />

Wiring short to positive, intake manifold air<br />

control solenoid<br />

Intake manifold air control solenoid - short<br />

to earth<br />

Wiring short to earth, intake manifold air control<br />

solenoid<br />

lntake manifold air control solenoid - open<br />

circuit<br />

Wiring open circuit, intake manifold air control<br />

solenoid<br />

Nitrogen oxides (NOx) sensor - heater<br />

control - short to earth<br />

Wiring short to earth, NOx sensor<br />

Nitrogen oxides (NOx) sensor - heater<br />

control - short to positive<br />

Wiring short to positive, NOx sensor<br />

Nitrogen oxides (NOx) sensor - heater<br />

control - incorrect signal<br />

Wiring, NOx sensor<br />

Nitrogen oxides (NOx) sensor - heater<br />

control - circuit malfunction<br />

Wiring, NOx sensor<br />

Mixture control (MC), bank 1 - malfunction<br />

Fuel pressurelpump, injector(s) intake leak<br />

Heated oxygen sensor (H02S) I,<br />

bank 1 - low voltagelair leak<br />

lntakelexhaust leak, fuel pressurelpump, wiring<br />

short to earth, H02S<br />

Heated oxygen sensor (H02S) 1,<br />

bank 1 - heater short to positive<br />

Wiring short to positive, H02S<br />

Heated oxygen sensor (H02S) I,<br />

bank 1 - heater output too low<br />

Wiring, H02S<br />

Heated oxygen sensor (H02S) 2,<br />

bank I - heater short to positive<br />

Wiring short to positive, H02S<br />

Heated oxygen sensor (H02S) 1,<br />

bank 2 - low voltagelair leak<br />

lntakelexhaust leak, fuel pressurelpump, wiring<br />

short to earth, H02S<br />

Heated oxygen sensor (H02S) 1,<br />

bank 2 - heater short to positive<br />

Heated oxygen sensor (H02S) 2,<br />

bank 2 - heater short to positive<br />

Wiring short to positive, H02S<br />

Heated oxygen sensor (H02S) control,<br />

bank 1 - system too lean<br />

lntakelexhaust leak, injector blocked, MAP sensor,<br />

MAF sensor, fuel pressurelpump, H02S<br />

Heated oxygen sensor (H02S) control,<br />

bank 1 - system too rich<br />

Excessive fuel in engine oil, injector leaking, fuel<br />

pressure, EVAP canister purge valve,<br />

MAP sensor, MAF sensor, H02S<br />

Heated oxygen sensor (H02S) 1,<br />

bank 1 - heater resistance too high<br />

Wiring, H02S<br />

Heated oxygen sensor (H02S) 2,<br />

bank 1 - heater resistance too high<br />

Wiring, H02S<br />

Heated oxygen sensor (H02S) 1,<br />

bank 1 - heater short to earth<br />

Wiring short to earth, H02S<br />

Heated oxygen sensor (H02S) 1,<br />

bank 1 - heater open circuit<br />

Wiring open circuit, H02S<br />

/<strong>Autodata</strong>- Engine management 111 1

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