[4] Check component G3/2 (O2 sensor upstream of KAT). Signal current: Open circuit

[4] Check component G3/2 (O2 sensor upstream of KAT). Signal current: Open circuit

Test 1: Check component O2 sensor.

1. Check component O2 sensor.
Important note

- After replacement of component G3/2 (O2 sensor upstream of KAT), the lambda values must be reset via menu 'Control unit adaptations'.
Communication with ECU required