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Home >> Saab >> 2002 >> 9-5 Arc, 4D Sedan >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Self-Diagnostics >> Fault Code Diagnosis >> P1631: Internal Control Module - Malfunction >> Enable Criteria

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Crankshaft stationary, even after ignition OFF. Car stationary. The other two absolute pressure sensors deviate less than 10 kPa from each other.