AutoCodes – Generic – P12FF

P12FF Code - Cylinder Deactivation Exhaust Flow Valve Actuator Performance Bank 2

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: P12FF indicates Cylinder Deactivation Exhaust Flow Valve Actuator Performance Bank 2.
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 12,959

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 13, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P12FF 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 P12FF - Cylinder Deactivation Exhaust Flow Valve Actuator Performance Bank 2 - AutoCodes.com — P12FF Code - Cylinder Deactivation Exhaust Flow Valve Actuator Performance Bank 2

What does this mean?

What are the Possible Causes of the DTC P12FF?

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 P12FF?

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 P12FF 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 P12FF code?

Need more information on how to fix the P12FF code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P12FF code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

P12FF Chevrolet — Cylinder Deactivation Exhaust Flow Valve Actuator Performance Bank 2
P12FF GMC — Cylinder Deactivation Exhaust Flow Valve Actuator Performance Bank 2

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 P12FF Code

1. What are the common symptoms of OBDII code P12FF?

The common symptoms of OBDII code P12FF include poor engine performance, rough idling, reduced fuel efficiency, and the illumination of the Check Engine Light.

2. What does OBDII code P12FF indicate?

OBDII code P12FF indicates an issue with the Cylinder Deactivation Exhaust Flow Valve Actuator performance in Bank 2 of the engine.

3. What are the possible causes of OBDII code P12FF?

Possible causes of OBDII code P12FF include a faulty exhaust flow valve actuator, wiring issues, low oil pressure, or mechanical problems within the engine.

4. How serious is OBDII code P12FF?

OBDII code P12FF should be addressed promptly, as it can lead to decreased engine performance and increased fuel consumption if left unresolved.

5. How can I diagnose OBDII code P12FF?

Diagnosing OBDII code P12FF typically involves using an OBDII scanner to retrieve the code, conducting a visual inspection of the exhaust flow valve actuator, and testing the actuator's functionality.

6. Can I drive my vehicle with OBDII code P12FF?

It is not recommended to drive your vehicle with OBDII code P12FF, as it can lead to further damage to the engine and potentially higher repair costs.

7. How can OBDII code P12FF be repaired?

Repairing OBDII code P12FF may involve replacing the faulty exhaust flow valve actuator, repairing any damaged wiring, addressing low oil pressure issues, or performing necessary engine repairs.

8. How much does it cost to fix OBDII code P12FF?

The cost to fix OBDII code P12FF can vary depending on the underlying cause of the issue, but it may range from a few hundred to over a thousand dollars, including parts and labor.

9. Can OBDII code P12FF be prevented?

Regular maintenance, such as oil changes and engine inspections, can help prevent issues that may trigger OBDII code P12FF. Additionally, addressing any warning signs promptly can help prevent further damage.

10. Is OBDII code P12FF a common issue in vehicles?

OBDII code P12FF is not as common as some other codes, but it can still occur in vehicles equipped with cylinder deactivation systems. Regular maintenance and timely repairs can help prevent this issue.