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Home >> Volvo >> 2004 >> V40 Base >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Control Module (ECM) Diagnostic Trouble Codes - 3 Of 3 >> ECM-91: Torque Reduction. Initialization Fault. Permanent Fault (B4204T2 CVVT; 2000) >> Initiation fault. Permanent fault >> Faulty signal >> Replacing engine control module (ECM) >> Reading and erasing diagnostic trouble codes (DTCs)

Reading and erasing diagnostic trouble codes (DTCs)

It is important that diagnostic trouble codes are read out and deleted upon control module replacement.

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