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

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Model: A2 A363 80 1,612,012,612,8 80 1,9 TDI (07193+) A41S4<br />

1001A6 1,812,012,612,814,2 A6 2,s TDI A6IS6IAllroad A81S8<br />

CoupelCabriolet 1,8/2,012,612,8 Cabriolet 1,9 TDI lT<br />

AUDI<br />

Engine management I<br />

VAG type<br />

5-digit<br />

a<br />

EOBD type<br />

-<br />

-<br />

-<br />

-<br />

-<br />

-<br />

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

Mass air flow (MAF) sensor,<br />

bank 1 - rangelperformance problem<br />

Mass air flow (MAF) sensor, bank 1 - low<br />

input<br />

Mass air flow (MAF) sensor, bank 1 - high<br />

input<br />

Manifold absolute pressure (MAP) sensor1<br />

barometric pressure (BARO)<br />

sensor - rangelperformance problem<br />

Manifold absolute pressure (MAP) sensor1<br />

barometric pressure (BARO) sensor - low<br />

input<br />

Manifold absolute pressure (MAP) sensor1<br />

barometric pressure (BARO) sensor - high<br />

input<br />

Probable cause<br />

Intake leak, wiring, MAF sensor<br />

Intake leak, air filter blocked, wiring short to<br />

earth, fuse, MAF sensor<br />

Wiring short to positive, earth wire defective, MAF<br />

sensor<br />

- Intake air temperature (IAT) sensor - low Wiring short to earth, IAT sensor<br />

input<br />

-<br />

-<br />

-<br />

Intake air temperature (IAT) sensor - high<br />

input<br />

Engine coolant temperature (ECT)<br />

sensor - rangelperformance problem<br />

Engine coolant temperature (ECT)<br />

sensor - low input<br />

lntakelexhaust leak, wiring, MAP sensor,<br />

BAR0 sensor<br />

Wiring short to earth, MAP sensor,<br />

BARO sensor<br />

Wiring short to positive, MAP sensor,<br />

BARO sensor<br />

Wiring open circuitlshort to positive, earth wire<br />

defective, IAT sensor<br />

Coolant thermostat, poor connection, wiring,<br />

ECT sensor<br />

-<br />

Engine coolant temperature (ECT) Coolant thermostat, wiring open circuitlshort to<br />

sensor - high input<br />

positive, earth wire defective, ECT sensor<br />

- Throttle position (TP) sensor - circuit Poor connection, wiring, TP sensor<br />

malfunction<br />

-<br />

-<br />

-<br />

-<br />

Throttle position (TP) sensor - range1<br />

performance problem<br />

Throttle position (TP) sensor - low input<br />

Throttle position (TP) sensor - high input<br />

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

bank 1 - circuit malfunction<br />

Coolant thermostat, wiring short to earth,<br />

ECT sensor<br />

Poor connection, TP sensor<br />

Signal wire short to earth, supply wire defective,<br />

TP sensor<br />

- Heated oxygen sensor (H02S) 1, I Wiring short to earth, HO2S<br />

bank 1 - voltage low<br />

-<br />

-<br />

-<br />

-<br />

-<br />

-<br />

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

bank 1 - voltage high<br />

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

bank 1 - slow response<br />

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

bank 1 - no activity detected<br />

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

bank 1 - heater circuit malfunction<br />

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

bank 1 - circuit malfunction<br />

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

bank 1 - low voltage<br />

Signal wire open circuitlshort to positive, earth<br />

wire defective, TP sensor<br />

Heating inoperative, poor connection, wiring,<br />

H02S<br />

Wiring short to positive, H02S<br />

Heating inoperative, wiring, H02S<br />

Wiring open circuit, heating inoperative, H02S<br />

Fuse, wiring, H02S<br />

Heating inoperative, wiring, H02S<br />

Wiring short to earth, exhaust leak, H02S<br />

4<br />

Eng~ne management a 103

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