Fault Handling I, Catalyst Damaging Misfiring

If catalyst damaging misfiring occurs, the driver is warned immediately by the CHECK ENGINE lamp flashing at 1 Hz, irrespective of whether the lamp was already on or not. A diagnostic trouble code will be generated at the same time.
For the CHECK ENGINE lamp to go out without any other measures being taken requires 3 consecutive driving cycles under similar operating conditions as when the fault first occurred without the catalyst damaging misfiring returning.
For the diagnostic trouble code to be cleared requires a further 40 fault-free warming-up cycles.
1 Fault criteria for catalyst damaging misfiring fulfilled







Dependents are OK
2 CHECK ENGINE lamp flashing at 1 Hz, diagnostic trouble code generated
3 Catalyst damaging misfiring ceases






4 Diagnostic Trouble Code cleared
5 CHECK ENGINE lamp goes on continuesly
6 Catalyst damaging misfiring does not occur for 40 warming-up cycles
7 Catalyst damaging misfiring does not occur for 3 consecutive driving cycles under similar operating conditions as when the fault first occurred
8 and
9 CHECK ENGINE lamp goes out