P1C12 - Vacuum Pump Relay Stuck Closed

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

  • Faulty Vacuum Pump Relay
  • Vacuum Pump Relay harness is open or shorted
  • Vacuum Pump Relay circuit poor electrical connection

Possible symptoms

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

P1c12 Description

The Engine Control Module (ECM) monitors the Vacuum Pump Relay. The ECM sets the OBDII code when the Vacuum Pump Relay is not to factory specifications.
OBDII Code P1c12 - Vacuum Pump Relay Stuck Closed - AutoCodes.com

P1C12 Information for specific makes

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P1C12 Comments

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