OBDII Code List

C0042 SUBARU - Power Supply Voltage Failure

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

  • Power Supply Voltage harness is open or shorted
  • Power Supply Voltage circuit poor electrical connection

Possible symptoms

  • Anti-Lock Brake System (ABS) Warning Light ON
  • Engine Light ON (or Service Engine Soon Warning Light)

C0042 Subaru Description

The Anti-Lock Brake System (ABS) Module monitors the Power Supply Voltage. The ABS Module sets the OBDII code when the Power Supply Voltage is not to factory specifications.
OBDII Code C0042 Subaru - Power Supply Voltage Failure -

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C0042 SUBARU Comments

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