Manufacturer Code Charts: 3111

[2] Oxygen sensor downstream of NOx storage catalytic converter (positive signal edge): Lambda signal increase is too low

Test 1: Check component G3/1 (O2 sensor downstream TWC).

1. Check component G3/1 (O2 sensor downstream TWC).
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)
- G3/1 (O2 sensor downstream TWC)
- 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