P12ED
Cylinder Deactivation Exhaust Flow Valve Feedback Circuit Incorrect Frequency Bank 1
P12ED is an OBD-II diagnostic trouble code meaning: Cylinder Deactivation Exhaust Flow Valve Feedback Circuit Incorrect Frequency Bank 1. Common causes: exhaust gas flow control valve malfunction, problems with wiring or contacts in the circuit. Estimated repair cost: $56–167.
Symptoms
- Check Engine light comes on
- Possible slight power loss
- Increased fuel consumption
- Unstable engine operation at idle
- The cylinder deactivation system may not work
Causes
- Exhaust gas flow control valve malfunction
- Problems with wiring or contacts in the circuit
- Short circuit or open circuit
- Engine control unit malfunction
- Mechanical valve jamming
How to Fix
- Check the condition of the exhaust gas flow control valve
- Check the integrity of the wiring and contacts in the circuit
- Measure valve resistance and performance
- If necessary, replace the faulty valve
- Reset the error and check the system operation
Related codes
FAQ
What does the P12ED code mean?
P12ED is an OBD-II diagnostic trouble code that indicates: Cylinder Deactivation Exhaust Flow Valve Feedback Circuit Incorrect Frequency Bank 1
What causes a P12ED error code?
The most common causes of P12ED include: Exhaust gas flow control valve malfunction; Problems with wiring or contacts in the circuit; Short circuit or open circuit; Engine control unit malfunction.
How do I fix a P12ED diagnostic trouble code?
To fix P12ED: Check the condition of the exhaust gas flow control valve. Check the integrity of the wiring and contacts in the circuit. Measure valve resistance and performance. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P12ED?
Yes, but get it checked soon
How much does it cost to fix P12ED?
The estimated repair cost for P12ED is $56–167. Actual cost depends on your vehicle, location, and labor rates.
See also: Russian version · NationStat