29E0 - P0171

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

none

29E0 - P0171 (DME)

29E0 - P0171

Information saved in

DME

Fault code

29E0 - P0171

Fault text

Mixture control

Fault description

System Too Lean (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

65 sec. lambda controller + adaptation deviation in max.

1200 sec.

Action in service

Visual inspection of affected components

Find and repair leaks

Mutual exchange of HFM or injector valves

Inspect HFM plug-in contacts and electrical wires

Check fuel pressure

Fault effect and breakdown warning

Driver information

Warning light:

MIL on in 2nd driving cycle