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Home >> Volvo >> 2009 >> V70 >> Repair and Diagnosis (Single Page) >> Engine Performance >> Testing & Diagnosis >> Differential Electronic Module (DEM), Driver Information Module (Dim), Engine And Engine Control Module (ECM) - Design And Function >> Engine Control Module (ECM) (B6324S2; 2010) >> Misfire Diagnostic >> Misfire Affecting Emission Levels
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Misfire Affecting Emission Levels

If the Engine control module (ECM) detects a certain number of misfires during 1, 000 engine RPM this is interpreted as misfires that affect emissions. Trouble code is stored and MIL-light is activated. Immediately in connection with engine start, that is, during the engine's first 1, 000 revs after start, the misfire diagnosis is four times as sensitive as later on in the driving cycle.

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