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Home >> Oldsmobile >> 2000 >> Intrigue GL >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Self-Diagnostics >> Diagnostic Tests >> DTC P1639: 5-Volt Reference "B" Circuit >> Circuit Description

Circuit Description

Powertrain Control Module (PCM) uses the 5-volt reference "B" circuit as a sensor feed for the A/C refrigerant pressure sensor. If voltage is out of tolerance, DTC will set.

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