29E0 – P0172 (DME)
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
