AutoCodes – Generic – P12F2

P12F2 Code - Cylinder Deactivation Exhaust Flow Valve Actuator Performance Bank 1

Quick Answer

The cylinder deactivation exhaust flow control system consists of valves installed at the inlet of the muffler. Common causes include 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. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means: P12F2 indicates Cylinder Deactivation Exhaust Flow Valve Actuator Performance Bank 1.
Common causes: Common causes include 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.
Severity: High - diagnose this code as soon as possible.
Can I drive?: Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

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Code Popularity 3,382

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Sep 12, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P12F2 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 P12F2 - Cylinder Deactivation Exhaust Flow Valve Actuator Performance Bank 1 - AutoCodes.com — P12F2 Code - Cylinder Deactivation Exhaust Flow Valve Actuator Performance Bank 1

What does this mean?

What are the Possible Causes of the DTC P12F2?

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

How to Fix the DTC P12F2?

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

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P12F2 code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the P12F2 code?

Need more information on how to fix the P12F2 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P12F2 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

P12F2 Chevrolet — Cylinder Deactivation Exhaust Flow Valve Actuator Performance Bank 1
P12F2 GMC — Cylinder Deactivation Exhaust Flow Valve Actuator Performance Bank 1

About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P12F2 Code

1. What are the common symptoms of OBDII code P12F2?

The common symptoms of OBDII code P12F2 include rough idling, poor engine performance, decreased fuel efficiency, and illuminated check engine light.

2. What does the OBDII code P12F2 indicate?

OBDII code P12F2 indicates an issue with the Cylinder Deactivation Exhaust Flow Valve Actuator Performance on Bank 1 of the engine.

3. What are the possible causes of OBDII code P12F2?

Possible causes of OBDII code P12F2 include a faulty exhaust flow valve actuator, wiring issues, vacuum leaks, or a problem with the engine control module.

4. How can I diagnose the OBDII code P12F2?

Diagnosing OBDII code P12F2 involves using a diagnostic scanner to retrieve the code, checking for any visible damage or leaks in the exhaust flow valve actuator system, and testing the actuator's functionality.

5. Can I continue driving with OBDII code P12F2 present?

It is not recommended to continue driving with OBDII code P12F2 present, as it can lead to further damage to the engine and decrease in performance.

6. How can I repair OBDII code P12F2?

Repairing OBDII code P12F2 may involve replacing the faulty exhaust flow valve actuator, repairing any wiring issues, fixing vacuum leaks, or reprogramming the engine control module.

7. Is it possible to clear OBDII code P12F2 without fixing the underlying issue?

While you can clear OBDII code P12F2 with a diagnostic scanner, it is important to address the underlying issue to prevent the code from reappearing.

8. Can a DIY enthusiast fix OBDII code P12F2?

Depending on the level of expertise and access to tools, a DIY enthusiast may be able to fix OBDII code P12F2 by following repair guides and procedures specific to their vehicle.

9. How much does it cost to repair OBDII code P12F2 at a mechanic?

The cost of repairing OBDII code P12F2 at a mechanic can vary depending on the extent of the issue, parts needed, and labor costs, but it can range from $200 to $500 or more.

10. How can I prevent OBDII code P12F2 from occurring in the future?

To prevent OBDII code P12F2 from occurring in the future, it is important to maintain regular vehicle maintenance, address any engine issues promptly, and drive responsibly to avoid stressing the exhaust flow valve actuator system.