Monday, April 13, 2020

2010-2020 BMW 128i Diagnostic and Repair Information

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

2010-2020 BMW 128i Convertible (E88) L6-3.0L (N51) WWW.168MOTIVE.COM Page 326

Warning light:

MIL on in 2nd driving cycle