P12F8
Cylinder Deactivation Exhaust Flow Valve Feedback Circuit Low Frequency Bank 2
P12F8 is an OBD-II diagnostic trouble code meaning: Cylinder Deactivation Exhaust Flow Valve Feedback Circuit Low Frequency Bank 2. Common causes: malfunction of the exhaust gas flow control valve, open or short in the feedback circuit. Estimated repair cost: $33–89.
Symptoms
- Deterioration in acceleration dynamics
- Increased fuel consumption
- Unstable engine operation
- Check engine light comes on
- Disabling the cylinder deactivation system
Causes
- Malfunction of the exhaust gas flow control valve
- Open or short in the feedback circuit
- Poor contact in valve connector
- Problems with the engine control unit
- Contact corrosion
How to Fix
- Check the integrity of the valve feedback circuit
- Check valve resistance and operation
- Inspect connectors and contacts for corrosion
- If necessary, replace the exhaust gas flow control valve
- Reset the code and check the system operation
Related codes
FAQ
What does the P12F8 code mean?
P12F8 is an OBD-II diagnostic trouble code that indicates: Cylinder Deactivation Exhaust Flow Valve Feedback Circuit Low Frequency Bank 2
What causes a P12F8 error code?
The most common causes of P12F8 include: Malfunction of the exhaust gas flow control valve; Open or short in the feedback circuit; Poor contact in valve connector; Problems with the engine control unit.
How do I fix a P12F8 diagnostic trouble code?
To fix P12F8: Check the integrity of the valve feedback circuit. Check valve resistance and operation. Inspect connectors and contacts for corrosion. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P12F8?
Yes, but get it checked soon
How much does it cost to fix P12F8?
The estimated repair cost for P12F8 is $33–89. Actual cost depends on your vehicle, location, and labor rates.
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