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

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AUDI<br />

Model: 80 1,612,O 1001A6 2,O<br />

Engine management<br />

type<br />

4-digit<br />

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

Probable cause<br />

I<br />

2322 I Intake air temperature (IAT) sensor I Wiring, IAT sensor<br />

2341 0 Heated oxygen sensor (H02S) - lambda control Heating inoperative, exhaust leak, misfire,<br />

fuel pressurelpump, EVAP canister purge valve<br />

2342 I Heated oxygen sensor (H02S) 1 Wiring, H02S, heating inoperative, fuel level low<br />

2413 Mixture control (MC)<br />

4444<br />

No fault found<br />

Fuel level low, fuel pressurelpump, intakelexhaust<br />

leak, misfire, H02S, EVAP canister purge valve,<br />

injector, excessive fuel in engine oil<br />

-<br />

<strong>Trouble</strong> code may be displayed if engine is not idling during self-diagnosis due to missing CKP sensor signal. Ignore trouble code if<br />

engine starts.<br />

H After repairs, erase learnt lambda control values: Wait 30 seconds. Disconnect battery or ECM multi-plug for at least 30 seconds.<br />

Carry out road test to allow ECM to re-learn basic values.<br />

type<br />

5-digit<br />

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

00000 I No fault found 1 -<br />

Probable cause<br />

00281 I Vehicle speed sensor (VSS) I Wiring, speedometer, VSS<br />

00282 1 Idle speed control (ISC) actuator I Wiring, multi-plug incorrectly wired, ISC actuator<br />

00515 rn I Crankshaft position (CKP) sensor I Insecure rotor, wiring, CKP sensor<br />

0051 6 / Closed throttle position (CTP) switch Accelerator cable adjustment, CTP switch<br />

adjustment, wiring, CTP switch<br />

00518<br />

00522<br />

Throttle position (TP) sensor<br />

Engine coolant temperature (ECT) sensor<br />

00523 1 Intake air temperature (IAT) sensor 1 Wiring, IAT sensor<br />

00524 1 Knock sensor (KS) I Wiring, KS<br />

00525 ( Heated oxygen sensor (H02S) I Wiring, H02S, heating inoperative, fuel level low<br />

00532 1 Engine control module (ECM) - supply voltage 1 Battery, wiring<br />

00537 I<br />

Wiring, poor connection, TP sensor<br />

Wiring, poor connection, ECT sensor<br />

Heated oxygen sensor (H02S) - lambda control Heating inoperative, exhaust leak, misfire,<br />

fuel pressurelpump, EVAP canister purge valve<br />

00525 1 Heated oxygen sensor (H02S) I Wiring, H02S, heating inoperative, fuel level low<br />

I<br />

Mixture control (MC)<br />

Idle speed control (ISC) actuator position sensor<br />

Engine control module (ECM) immobilizer active<br />

65535 I Engine control module (ECM) I ECM<br />

rn <strong>Trouble</strong> code may be displayed if engine is not idling during self-diagnosis due to missing CKP sensor signal. Ignore trouble code if<br />

englne starts.<br />

After repairs, erase learnt lambda control values: Wait 30 seconds. Disconnect battery or ECM multi-plug for at least 30 seconds.<br />

Carry out road test to allow ECM to re-learn basic values.<br />

a<br />

I<br />

Fuel level low, fuel pressurelpump, intakelexhaust<br />

leak, misfire, H02S, EVAP canister purge valve,<br />

injector, excessive fuel in engine oil<br />

Wiring, throttle valve, ISC actuator position sensor<br />

lncorrectldamaged key, incorrectly coded,<br />

ECMlimmobilizer replacement without coding, wiring,<br />

immobilizer defective

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