Fault Handling, (I) Catalyst Damaging Misfire

In the event of misfiring which is harmful to the three way catalytic converter the driver is immediately warned by the CHECK ENGINE lamp (MIL) flashing at a frequency of 1 Hz, regardless of whether it was already on or not. A diagnostic trouble code is also generated.

To facilitate fault diagnosis a special code is generated at the same time if there is less than 10 litres of fuel in the tank.

For the CHECK ENGINE lamp (MIL) to go out by itself, 3 consecutive driving cycles carried out under similar conditions as when the fault first occurred must be completed without any misfiring which is harmful to the three way catalytic converter occurring.

For the diagnostic trouble code to be cleared, as well as any special code for low fuel level that may also have been generated, 40 faultless warm-up cycles must also be completed.