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volkswagen Workshop Repair Guides


Eos (1F7) V6-3.2L (BUB) (2008)

Powertrain Management > Sensors and Switches - Powertrain Management > Sensors and Switches - Computers and Control Systems > Oxygen Sensor > Component Information > Testing and Inspection > Functions, Checking > Page 2605

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electrical harness connector T121 terminals for an open circuit.

Specified value: 1.5 ohms Max.

If the specification was not obtained:

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Check the wiring for a short circuit to each other, Battery (+), and Ground (GND).

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Check the electrical harness connector for damage, corrosion, lose or broken terminals.

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If necessary, repair the faulty wiring connection.

If no malfunction is found in the wiring:

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Erase the DTC memory. Refer to => [ Diagnostic Mode 04 - Erase DTC Memory ] See: Computers and Control Systems/Testing and
Inspection/Scan Tool Testing and Procedures/Diagnostic Modes 01 - 09 [ (BPY)  (BUB) ]/Diagnostic Mode 04 - Erase DTC Memory

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Perform a road test to verify repair.

If the DTC does not return:

Repair complete, Generate readiness code. Refer to => [ Readiness Code Description ] See: Computers and Control Systems/Testing and
Inspection/Monitors, Trips, Drive Cycles and Readiness Codes. 

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End diagnosis.

If the DTC does return and no malfunction is detected in the wiring and the voltage supply was OK:

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Replace the Engine Control Module (ECM) (J623 ). Refer to => [ Engine Control Module J623, Replacing ] See: Computers and Control
Systems/Engine Control Module/Service and Repair/Engine Control Module J623, Replacing.

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Assembly is performed in the reverse of the removal.

Final procedures

After repair work, the following work steps must be performed in the following sequence:

Powertrain Management > Sensors and Switches - Powertrain Management > Sensors and Switches - Computers and Control Systems > Oxygen Sensor > Component Information > Testing and Inspection > Functions, Checking > Page 2605

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