AutoCodes.com | All About OBDII Engine Codes
AutoCodes - Chevrolet - P12EF Chevrolet

P12EF Chevrolet Code - Cylinder Deactivation Exhaust Flow Valve Stuck Closed Bank 1

- Code Popularity: 1,124 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
Table of contents
Share on Facebook   Share on Twitter   Share on Linkedin

What are the Possible Causes of the DTC P12EF Chevrolet?

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
⚠ Does your Chevrolet have Safety Recalls? → Check here

How to Fix the DTC P12EF Chevrolet?

Review the 'Possible Causes' mentioned above and visually examine the corresponding wiring harness and connectors. Ensure to check for any damaged components and inspect the connector pins for signs of being broken, bent, pushed out, or corroded.

Search for P12EF Chevrolet Questions and Answers: Search here →

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P12EF Chevrolet code, it typically requires 1.0 hour of labor. The specific diagnosis time and labor rates at auto repair shops can differ based on factors such as the location, make and model of the vehicle, and even the engine type. It is common for most auto repair shops to charge between $75 and $150 per hour.

What are Code Possible Symptoms?

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

Code P12EF Chevrolet Description

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.

OBDII Code P12EF Chevrolet - Cylinder Deactivation Exhaust Flow Valve Stuck Closed Bank 1 - AutoCodes.com
P12EF Chevrolet Code - Cylinder Deactivation Exhaust Flow Valve Stuck Closed Bank 1

Need More Information on the Code?

Need more information on how to fix the P12EF Chevrolet code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P12EF Chevrolet code diagnosed by a professional: Find a repair shop in your area

Code P12EF Chevrolet comments

Help us improve AutoCodes.com. Leave a comment below or tell us if the information above helps you fix the code. What are the symptoms on your vehicle for the P12EF Chevrolet code? Have you replaced any parts?
Any information is appreciated. Thanks