2019 BMW 128i Convertible (E88) L6-3.0L (N51) A L L Diagnostic Trouble Codes ( DTC ): Manufacturer Code Charts Page 329
Fault code
29E1 - P0174
Fault text
Mixture control 2
Fault description
System Too Lean (Bank 2)
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
Service instruction
none
29E1 - P0175 (DME)
29E1 - P0175
Information saved in
DME
Fault code
29E1 - P0175
Fault text
Mixture control 2
Fault description
System Too Rich (Bank 2)
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
