On-Board Diagnostics

Type of diagnosis:

Continuous. But interrupted when fault criteria fulfilled and will not restart until next driving cycle.

Enable criteria

General conditions for this trouble code: Atmospheric pressure must exceed 72 kPa and the engine coolant and intake air temperature must exceed -7°C.
Engine started. Fuel level below 4 liters. Main relay voltage exceeding 10V. Ignition discharge module combustion signals registered. The number of missing combustion signals is accumulated for each cylinder during 200 engine revolutions. The total number of accepted misfires during 200 engine revolutions is specified in a load and engine speed-dependent matrix.

Fault criteria

Number of missing combustions exceeding number of accepted misfires. More than one cylinder has misfired.

Dependents

System reaction to a fault

OK report

Provided fault criteria are not fulfilled during the driving cycle, the OK report will made when the ignition is turned off and before the engine stops. Two other types of OK report can also be made:
Type 1: If a diagnostic trouble code has already been stored for the diagnosis and the same running conditions have occurred (coolant temperature above or below 71°C, engine speed +/-375 RPM and load +/-10%).

Type 2: If there is no diagnostic trouble code stored for the diagnosis or the same running conditions have not occurred.