Engine-Codes - GMC - P12F9 GMC

P12F9 GMC Code - Cylinder Deactivation Exhaust Flow Valve Feedback Circuit High Frequency Bank 2

- Code Popularity: 979 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
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What are the Possible Causes of the DTC P12F9 GMC?

NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.
  • Faulty Cylinder Deactivation Exhaust Flow Valve
  • Cylinder Deactivation Exhaust Flow Valve harness is open or shorted
  • Cylinder Deactivation Exhaust Flow Valve circuit poor electrical connection
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How to Fix the DTC P12F9 GMC?

Check the 'Possible Causes' listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.

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What is the Cost to Diagnose the Code?

Labor: 1.0

The cost to diagnose the P12F9 GMC code is 1.0 hour of labor. The diagnosis time and labor rates at auto repair shops vary depending on the location, make and model of the vehicle, and even the engine type. Most auto repair shops charge between $75 and $150 per hour.

What are Code Possible Symptoms?

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

What Does the P12F9 GMC Code Mean?

The cylinder deactivation exhaust flow control system consists of valves installed at the inlet of the muffler. The exhaust flow control system is used to tune the exhaust note. The Powertrain Control Module (PCM) monitors the Cylinder Deactivation Exhaust Flow Valve. The PCM sets the OBDII code when the Cylinder Deactivation Exhaust Flow Valve is not to factory specifications.

P12F9 GMC Code - Cylinder Deactivation Exhaust Flow Valve Feedback Circuit High Frequency Bank 2

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