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Home >> Cadillac >> 2003 >> Seville SLS >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Self-Diagnostics >> Diagnostic Tests >> DTC P1639: 5-Volt Reference 2 Circuit >> Conditions For Setting DTC

Conditions For Setting DTC

The PCM detects a voltage out of tolerance condition on the 5-volt reference 2 circuit.
The condition is present for more than 2 seconds.

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