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Home >> Chevrolet >> 2001 >> Camaro Base, 2D Convertible, Standard >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System Self-Diagnostics - 3.8L >> Diagnostic Tests >> DTC P1635: 5-Volt Reference 1 Circuit >> Code Enable Criteria

Code Enable Criteria

For DTC to run, engine must be running. DTC will set when PCM detects a voltage out of tolerance condition on the 5-volt reference 1 circuit for more than 10 seconds.

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