P0172

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

Service instruction
none