29ED - P2178 (DME)

29ED - P2178

Information saved in
DME

Fault code
29ED - P2178

Fault text
Fuel mixture adaptation, lower engine speed range

Fault description
System Too Rich Off Idle (Bank 1)

Condition for fault identification
Test condition:
Fuel-supply system monitored with aid of mixture
adaptation data; here lower part-load range (multiplicative
adaptation), system too rich
Release conditions:
- No active tank ventilation
- No fault preventing diagnosis is present
- Relative charge (load) > 20 %
- Mass airflow > 40 kg/h
- Temperature conditions met
Terminal condition: Engine running
Voltage condition:
battery voltage < 11 volts or battery voltage > 16 volts

Condition for fault memory entry
Approximately 10 min.

Action in service
High fuel pressure
Check positive crankcase ventilation
Check HFM (contamination, defective)
Check oxygen sensors before cat.

Fault effect and breakdown warning


Driver information
Warning light:
ECE MIL on (2nd cycle)

Service instruction
none