A6 Quattro Sedan V6-2.7L Turbo (APB) (2000)
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Check fuse S234 (in fuse holder, position 34).
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Check wire connection from exhaust gas temperature sensor via fuse S234 (in fuse holder, socket 34) to Fuel Pump (FP) relay for open circuit:
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Check Fuel Pump (FP) relay.
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Connect VAG1598/31 test box at wiring harness to ECM, do not connect ECM.
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Check following wire connections for open circuit and short circuit to Ground (GND) and B+:
Harness connector
VAG1598/31 test box
terminal
Bushing
1 (Bank 1)
61
1 (Bank 2)
20
2
50
If wire connection is OK:
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Replace exhaust gas temperature sensor.
If the same malfunction occurs again after replacing the exhaust gas temperature sensor:
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Replace Engine Control Module (ECM).