Manufacturer Code Charts: 2057

[4] Check component G3/2 (O2 sensor upstream of KAT).: Short circuit O2 sensor heater / Pump current


Possible cause:

- O2 sensor upstream TWC
Affected functions:

- Exhaust system

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Test 1: Check component G3/2 (O2 sensor upstream of KAT).

1. Check component G3/2 (O2 sensor upstream of KAT).
Important note:Reset quantity mean value adaptation data after replacing the following components:(Control unit adaptations/Reset quantity mean value adaptation data.)

- G3/2 (O2 sensor upstream of KAT)
- B2/6 (Left hot film mass air flow sensor)
- B2/7 (Right hot film mass air flow sensor)
- B4/6 (Rail pressure sensor)
- Air filter
Communication with ECU required