[regular guy]

2789 - P0420

2789 - P0420
Information saved in	DME
Fault code	2789 - P0420
Fault text	Catalytic-converter conversion, bank 1
Fault description	Catalyst System Efficiency Below Threshold (Bank 1)
Condition for fault identification	Test condition: Diagnosis value above threshold K_KAT_OBD_WERT_MAX
	Terminal condition: Engine running - Condition idle or part-load
	Voltage condition: none
Condition for fault memory entry	none
Action in service	1. Check exhaust system for leaks
	2. No faults related to oxygen sensor or fuel system or VANOS should be present
	3. Conduct oxygen sensor test routines, even if no oxygen sensor fault is present.
	4. Replace catalytic conveter near engine
Fault effect and breakdown warning	MIL on after engine runs 2x
Driver information	Warning light: MIL
Service instruction	None