14E400

Oxygen sensor 1 (cylinder bank 1) has a malfunction.


Possible cause:

- G3/2 (Oxygen sensor upstream of catalytic converter)
Affected functions:

- Power generation

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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).
Check component G3/2 (O2 sensor upstream of KAT).
Possible cause and remedy

- Check whether the correct oxygen sensor is installed.
Question

- Is the correct oxygen sensor installed?


YES
The correct oxygen sensor is installed.Possible cause and remedy

- Replace component G3/2 (O2 sensor upstream of KAT).
- After replacing component G3/2 (O2 sensor upstream of KAT), the teach-in process for this component must be performed via menu 'Control unit adaptations'.
- Erase fault memory.
End of test

NO
An incorrect oxygen sensor is installed.Possible cause and remedy

- Replace component G3/2 (O2 sensor upstream of KAT).
- After replacing component G3/2 (O2 sensor upstream of KAT), the teach-in process for this component must be performed via menu 'Control unit adaptations'.
- Erase fault memory.
End of test