14DD00

The signal return line connection of oxygen sensor 1 (cylinder bank 1) has an electrical fault or open circuit.


Possible cause:

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

- Power generation

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Test 1: Test cables

1. Test cables
Check line from control module N3/9 (CDI control unit) to component G3/2 (O2 sensor upstream of KAT).
Possible cause and remedy

- Check electrical lines and connectors between control unit N3/9 (CDI control unit) and component G3/2 (O2 sensor upstream of KAT) for loose contact and corrosion.
- Check electrical lines and connectors between control unit N3/9 (CDI control unit) and component G3/2 (O2 sensor upstream of KAT) for short and open circuit.
Question

- Are the electrical lines or connectors OK?


YES
The electrical lines or connectors are OK.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
The electrical lines or connectors are not OK.Possible cause and remedy

- Repair or, if necessary, replace damaged electrical lines and connectors between control unit N3/9 (CDI control unit) and component G3/2 (O2 sensor upstream of KAT).
End of test