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Home >> Oldsmobile >> 2001 >> Bravada >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls Self-Diagnostics - 4.3L >> Diagnostic Tests >> DTC P1635: 5-Volt Reference 1 Circuit Out Of Tolerance >> Code Enable Criteria

Code Enable Criteria

DTC will run when engine is running and DTC will set when PCM detects a voltage out of range/tolerance condition on the 5-volt reference 1 circuit for more than 10 seconds.

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