volkswagen Workshop Repair Guides

Volkswagen Workshop Service and Repair Manuals

Heated Oxygen Sensor (HO2S) G39 and Oxygen Sensor Regulation Before Catalytic Converter, Checking|Page 2033 > < Heated Oxygen Sensor (HO2S) G39 and Oxygen Sensor Regulation Before Catalytic Converter, Checking|Page 2031
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Check the wiring for a short circuit to Battery positive (+) or an open circuit.

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If necessary, repair the wiring connection.

If no malfunctions are found in the wiring:

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Replace the Engine Control Module (ECM) J623.

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

Final procedures

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

1. Check the DTC memory. See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Scan Tool Testing and

Procedures/Diagnostic Mode 03: Interrogating Fault Memory

2. If necessary, erase the DTC memory. See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Scan Tool Testing and

Procedures/Diagnostic Mode 04: Reset/Delete Diagnostic Data

3. If the DTC memory was erased, generate readiness code. See: Powertrain Management/Computers and Control Systems/Testing and

Inspection/Monitors, Trips, Drive Cycles and Readiness Codes

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End of diagnosis.

Heated Oxygen Sensor (HO2S) G39 and Oxygen Sensor Regulation Before Catalytic Converter, Checking|Page 2033 > < Heated Oxygen Sensor (HO2S) G39 and Oxygen Sensor Regulation Before Catalytic Converter, Checking|Page 2031