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P1EF7 BUICK

P1EF7 BUICK - Battery Charger Control Module Ignition On/Start Switch Circuit High Voltage

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

  • Faulty Hybrid Powertrain Control Module 2
  • Hybrid Powertrain Control Module 2 harness is open or shorted
  • Hybrid Powertrain Control Module 2 circuit poor electrical connection

Possible symptoms

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

P1ef7 Buick Description

The Body Control Module (BCM) controls the ignition run relay through the control circuit by applying voltage to the circuit. The ignition circuit is energized when the vehicle power mode is Vehicle ON or Vehicle in Service Mode. The hybrid powertrain control module 2 sends the vehicle power mode status in a serial data message to the battery charger control module, A/C compressor, battery energy control module, fuel pump control module and the Transmission Control Module (TCM).
OBDII Code P1ef7 Buick - Battery Charger Control Module Ignition On/Start Switch Circuit High Voltage - AutoCodes.com

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