P1A8D BUICK - 14 Volt Power Module Voltage Sensor Circuit Low Voltage
- Faulty 14 Volt Power Module Voltage Sensor
- 14 Volt Power Module Voltage Sensor harness is open or shorted
- 14 Volt Power Module Voltage Sensor circuit poor electrical connection
- Engine Light ON (or Service Engine Soon Warning Light)
P1a8d Buick DescriptionThe Auxiliary Power Module (APM) 12-volt output voltage is used for a 12-volt line APM output voltage control and a 12-volt line voltage sensor rationality check. The Starter/Generator Control Module (SGCM) monitors the voltage sensor for the following:
To detect the failure of the APM 12-volt voltage sensor circuit below valid range.
To detect the failure of the APM 12-volt voltage sensor circuit above valid range.
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