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

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[ 98 I,,,,,,,,,, FEngine management Model: A2 A3lS3 80 1,6/2,012,6/2,8 80 1,9 TDI (07193+) A4lS4 100lA6 1,8/2,012,6/2,814,2 A6 2,s TDI A6lS61Allroad A8lS8 CoupelCabriolet 1,812,012,6/2,8 Cabriolet 1,9 TDI TT vAG 5-digit 1 EOBD type I F~UN location Probable cause 00521 I - I Mixture adjustment resistor I Wiring, mixture adjustment resistor 00522 1 - I Engine coolant temperature (ECT) sensor I Wiring, poor connection, ECT sensor 00523 00524 - - 00525 I - Heated oxygen sensor (H02S) 1 - implausible signal - -- Wiring, poor connection, IAT sensor Wiring, KS, ECM I Wiring. H025, heating inoperative, fuel level low 00526 1 - I Stop lamp switch I Wiring, stop lamp switch 00527 00528 00529 00530 00532 00533 00534 00535 - - - - - - - - 00536 I - 00539 00540 - - Intake air temperature (IAT) sensor Knock sensor (KS) 1 Intake air temperature (IAT) sensor Barometric pressure (BARO) sensor Crankshaft position (CKP) sensor - - Wiring, poor connection, IAT sensor Wiring, BAR0 sensor Wiring, CKP sensor Idle speed control (ISC) actuatorlposition Wiring, poor connection, multi-plug incorrectly sensor wired, ISC actuatorlposition sensor Engine control module (ECM) - Fuse, alternator, battery, current draw with supply voltage ignition OFF, engine control relay, wiring Idle speed control (ISC) Intake leaklblockage, throttle valve tightlsticking, ----- IAC valve or ISC actuatorlposition sensor Engine oil temperature (EOT) sensor Wiring, EOT sensor Engine control module (ECM) - Wiring, KS, ECM knock control 1 Engine control module (ECM) - I Wiring, KS, ECM knock control 2 Heated oxygen sensor (H02S) - CO adjustment, heating inoperative, lambda control intakelexhaust leak, misfire, fuel level low, fuel pressurelpump, injector(s), EVAP canister purge valve, MAP sensor, MAF sensor filament burn-off, wiring, H02S Fuel temperature sensor Wiring, fuel temperature sensor Knock sensor (KS) 2 Wiring, KS, ECM Air in fuel system, fuel level low, wiring, injector needle lift sensor Maximum engine RPM exceeded Incorrect gear shift, CKPIRPM sensor, AT fault, I ECM Maximum boost pressure exceeded Hoses interchangedlnot connected, hoses blockedlleaking, TC wastegate actuator1 regulating valve, MAP sensor ECMrTCM electrical connection TCM trouble code(s) stored, wiring, transmission fault Data link connector (DLC) - defective Wiring Instrument panel, fuel consumption signal Wiring short to positive, instrument panel Start of injection - control Wiring, fuel injection timing solenoid, injector needle lift sensor, air in fuel system, fuel level low, pump timing Volume air flow (VAF) sensor Intake leak, wiring, VAF sensor Mass air flow (MAF) sensor Intake leak, wiring, MAF sensor 00542 I - I Injector needle lift sensor 00545 00546 00549 00550 00552 00553 - - - - - -

Model: A2 A31S3 80 1,612,0/2,612,8 80 1,9 TDI (07193 -+) A41S4 1001A6 1,8/2,0/2,6/2,8/4,2 A6 2,s TDI A6/S6/Allroad A81S8 CoupeICabriolet 1,8/2,0/2,612,8 Cabriolet 1,9 TDI lT AUDI Engine management 1 -- VAG type 5-digit EOBD type - Fault location Heated oxygen sensor (H02S) - lambda control Probable cause - Heated oxygen sensor (H02S) 2 - Wiring, H02S, heating inoperative, fuel level low implausible signal - - - Power steering pressure (PSP) switch - short to earth Exhaust gas recirculation (EGR) - control difference Mixture control (MC) - I Intake manifold pressure - - - - - - - Knock control, cylinder 1 - control limit exceeded Knock control, cylinder 2 - control limit exceeded Knock control, cylinder 3 - control limit exceeded Knock control, cylinder 4 - control limit exceeded Knock control, cylinder 5 - control limit exceeded Knock control, cylinder 6 - control limit exceeded Exhaust gas recirculation temperature (EGRT) sensor - I Exhaust gas recirculation (EGR) system - EGR solenoid control - I Ignition amplifier,primary%cuit 1- W~ring, CO adjustment, heating inoperative, intakelexhaust leak, misfire, fuel level low, fuel pressurelpump, injector(s), EVAP canister purge valve, MAP sensor, MAF sensor filament burn-off, wiring, H02S Wiring short to earth, PSP switch Intake leak, EGR valveisolenoid I -- - Trouble codes 00525100533 stored, fuel level low, fuel pressurelpump, intakelexhaust leak, misfire, MAP sensor, MAF sensor filament burn-off, H02S, EVAP canister purge valve, injector(s), excessive fuel in engine oil lntake leaklblockage, MAF sensor, MAP sensor, TC wastegate actuatorlregulating valve, hoses interchangedlnot connected, wiring Fuel pressure, misfire, intake leak, injector(s) Fuel pressure, misfire, intake leak, injector(s) Fuel pressure, misfire, intake leak, injector(s) Fuel pressure, misfire, intake leak, injector(s) Fuel pressure, misfire, intake leak, injector(s) Fuel pressure, misfire, intake leak, injector(s) 1 ; ignition amplifier - I Ignition amplifier, primary circuit 2 I Wiring, ignition amplifier - - - - Ignition amplifier, primary circuit 3 AC signal - compressor cut-in Vehicle speed signal Glow plug warning lamp - Fuel filter water level sensor - Fuel injection pump control module - engine stop malfunction I I Wiring, EGRT sensor Wiring, ignition amplifier Wiring, AC system Wiring, speedometer, VSS Wiring, glow plug warning lamp Water in filter, wiring, fuel filter water level sensor Wiring, fuel injection pump - Heated oxygen sensor (H02S) 1, Wiring, H02S bank 1 - heater circuit malfunction - ECMITCM electrical connection Wiring, transmission fault - I Oxygen sensor heater relay I Wiring, oxygen sensor heater relay

[ 98 I,,,,,,,,,,<br />

FEngine management<br />

Model: A2 A3lS3 80 1,6/2,012,6/2,8 80 1,9 TDI (07193+) A4lS4<br />

100lA6 1,8/2,012,6/2,814,2 A6 2,s TDI A6lS61Allroad A8lS8<br />

CoupelCabriolet 1,812,012,6/2,8 Cabriolet 1,9 TDI TT<br />

vAG<br />

5-digit<br />

1 EOBD type I F~UN location<br />

Probable cause<br />

00521 I - I Mixture adjustment resistor I Wiring, mixture adjustment resistor<br />

00522 1 - I Engine coolant temperature (ECT) sensor I Wiring, poor connection, ECT sensor<br />

00523<br />

00524<br />

-<br />

-<br />

00525<br />

I -<br />

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

implausible signal<br />

- --<br />

Wiring, poor connection, IAT sensor<br />

Wiring, KS, ECM<br />

I Wiring. H025, heating inoperative, fuel level low<br />

00526 1 - I Stop lamp switch I Wiring, stop lamp switch<br />

00527<br />

00528<br />

00529<br />

00530<br />

00532<br />

00533<br />

00534<br />

00535<br />

-<br />

-<br />

-<br />

-<br />

-<br />

-<br />

-<br />

-<br />

00536<br />

I -<br />

00539<br />

00540<br />

-<br />

-<br />

Intake air temperature (IAT) sensor<br />

Knock sensor (KS) 1<br />

Intake air temperature (IAT) sensor<br />

Barometric pressure (BARO) sensor<br />

Crankshaft position (CKP) sensor<br />

- -<br />

Wiring, poor connection, IAT sensor<br />

Wiring, BAR0 sensor<br />

Wiring, CKP sensor<br />

Idle speed control (ISC) actuatorlposition Wiring, poor connection, multi-plug incorrectly<br />

sensor<br />

wired, ISC actuatorlposition sensor<br />

Engine control module (ECM) -<br />

Fuse, alternator, battery, current draw with<br />

supply voltage<br />

ignition OFF, engine control relay, wiring<br />

Idle speed control (ISC)<br />

Intake leaklblockage, throttle valve tightlsticking,<br />

-----<br />

IAC valve or ISC actuatorlposition sensor<br />

Engine oil temperature (EOT) sensor Wiring, EOT sensor<br />

Engine control module (ECM) -<br />

Wiring, KS, ECM<br />

knock control 1<br />

Engine control module (ECM) -<br />

I Wiring, KS, ECM<br />

knock control 2<br />

Heated oxygen sensor (H02S) -<br />

CO adjustment, heating inoperative,<br />

lambda control<br />

intakelexhaust leak, misfire, fuel level low, fuel<br />

pressurelpump, injector(s), EVAP canister purge<br />

valve, MAP sensor, MAF sensor filament burn-off,<br />

wiring, H02S<br />

Fuel temperature sensor<br />

Wiring, fuel temperature sensor<br />

Knock sensor (KS) 2<br />

Wiring, KS, ECM<br />

Air in fuel system, fuel level low, wiring, injector<br />

needle lift sensor<br />

Maximum engine RPM exceeded<br />

Incorrect gear shift, CKPIRPM sensor, AT fault,<br />

I ECM<br />

Maximum boost pressure exceeded Hoses interchangedlnot connected, hoses<br />

blockedlleaking, TC wastegate actuator1<br />

regulating valve, MAP sensor<br />

ECMrTCM electrical connection<br />

TCM trouble code(s) stored, wiring, transmission<br />

fault<br />

Data link connector (DLC) - defective Wiring<br />

Instrument panel, fuel consumption signal Wiring short to positive, instrument panel<br />

Start of injection - control<br />

Wiring, fuel injection timing solenoid, injector<br />

needle lift sensor, air in fuel system, fuel level<br />

low, pump timing<br />

Volume air flow (VAF) sensor<br />

Intake leak, wiring, VAF sensor<br />

Mass air flow (MAF) sensor<br />

Intake leak, wiring, MAF sensor<br />

00542<br />

I -<br />

I Injector needle lift sensor<br />

00545<br />

00546<br />

00549<br />

00550<br />

00552<br />

00553<br />

-<br />

-<br />

-<br />

-<br />

-<br />

-

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