A8 Quattro Sedan V8-4.2L (BGK) (2006)
Wire Connections, Checking
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Connect test box (VAG1598/31) to wiring harness of Engine Control Module (ECM),
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Check the following wire connections for open circuit, short circuit to B+ or Ground (GND).
Heated Oxygen Sensor (HO2S) (G39) before catalytic converter bank 1
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Repair open circuit in wiring or short circuit if necessary.
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Check wire connections to each other for short circuit.
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If wire connection is OK, replace Engine Control Module (ECM), refer to Repair Manual and generate readiness code again => [ Readiness Code,
Generating ] See: Computers and Control Systems/Testing and Inspection/Monitors, Trips, Drive Cycles and Readiness Codes.
Heated Oxygen Sensor (HO2S) 2 (G108) before catalytic converter bank 1