29E0 - P0172

2020 BMW 128i Coupe (E82) L6-3.0L (N51) Diagnostic Trouble Codes ( DTC ): Service instruction

none

29E0 - P0172 (DME)

29E0 - P0172

Information saved in

DME

Fault code

29E0 - P0172

Fault text

Mixture control

Fault description

System Too Rich (Bank 1)

Condition for fault identification

Test condition:

Closed-loop lambda mixture control = Active Terminal condition: Engine must be running Voltage condition:

none

Condition for fault memory entry

75 sec. lambda controller + adaptation deviation in max. 1200 sec.

Action in service

Visual inspection of affected components

Reverse mutual installation positions of HFM or injector valves

Check HFM plug contacts and electrical wiring

Check fuel pressure

Catalyst on one bank melted (visual inspection through O2 sensor fittings)?

Fault effect and breakdown warning

Driver information

Warning light:

MIL on in 2nd driving cycle