Passat L4-1.8L Turbo (AWM) (2004)
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Disconnect 6-pin harness connector (black) to Heated Oxygen Sensor (HO2S) -G39- (-2-).
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Set multimeter for resistance measurement and connect it to terminals 3 + 4 at connector for oxygen sensor. Check oxygen sensor heater for
continuity.
Specified value: 2.5 to 10 ohms (at room temperature)
Continued for all vehicles
If an open circuit is found in the oxygen sensor heater:
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Replace Heated Oxygen Sensor (HO2S) -G39- before catalytic converter
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Erase DTC memory of Engine Control Module (ECM), Diagnostic mode 4: Reset/erase diagnostic data. See: Testing and Inspection/Scan Tool
Testing and Procedures/With Generic Scan Tool/Diagnostic Mode 4: Reset/Erase Diagnostic Data
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Generate readiness code
If oxygen sensor heater has continuity:
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Check voltage supply and wiring
Checking voltage supply and wiring
Vehicles with engine code AEB