29F4

29F4 - P0420

Information saved in
DME

Fault code
29F4 - P0420

Fault text
Catalytic-converter conversion

Fault description
Catalyst System Efficiency Below Threshold (Bank 1)

Condition for fault identification
Test condition:
Oxygen storage capability
Catalytic converter temperature (model)
O2 sensor status
Fuel system
4g/sec. <= Exhaust-gas mass airflow <= 22g/sec.
Terminal condition: Terminal 15 on
Engine running
Voltage condition:
none

Condition for fault memory entry
40 sec./ continuous
Mean oxygen storage capability derived from three
measurements

Action in service
Conduct KAT system test
Replace catalytic converter as indicated

Fault effect and breakdown warning


Driver information
Warning light:
MIL on

Service instruction
none