Shutting off the misfire diagnostic
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2006 Volvo S80, 2005 Volvo S80, 2004 Volvo S80, 2003 Volvo S80, and 2002 Volvo S80. However, it is still accessible from the selected car via links, so may be relevant.
Misfire diagnostics are shut off in the event of
- driveline oscillations.
Drive line oscillations, caused by uneven road surfaces for example, may lead to uneven engine operation. Drive line oscillations will be posted by the ABS system and this information is sent to the engine control module (ECM). The engine control module (ECM) uses this information in order to differentiate between oscillations and actual misfiring and the diagnostic is shut off.
- diagnostic trouble codes (DTCs) in the flywheel sensor, mass air flow (MAF) sensor, ABS and camshaft position (CMP) sensor.