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Home › Cadillac › 2003 › Seville SLS › Repair and Diagnosis › Engine Performance › System › Engine Controls - Self-Diagnostics › Diagnostic Tests › DTC P1635: 5-Volt Reference 1 Circuit › Conditions For Setting DTC

Conditions For Setting DTC

The PCM detects a voltage out of tolerance condition on the 5-volt reference circuit.
The condition is met for more than 10 seconds.