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P1A8D CADILLAC

P1A8D CADILLAC - 14 Volt Power Module Voltage Sensor Circuit Low Voltage

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3   
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Possible causes

  • 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

Possible symptoms

  • Engine Light ON (or Service Engine Soon Warning Light)

P1a8d Cadillac Description

The 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.

OBDII Code P1a8d Cadillac - 14 Volt Power Module Voltage Sensor Circuit Low Voltage - AutoCodes.com

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P1A8D CADILLAC Comments

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