2010 BMW 128i Convertible (E88) L6-3.0L (N52K) P Code Charts
none
P0171
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
