OBD Guide
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P12F2

Cylinder Deactivation Exhaust Flow Valve Actuator Performance Bank 1

P12F2 is an OBD-II diagnostic trouble code meaning: Cylinder Deactivation Exhaust Flow Valve Actuator Performance Bank 1. Common causes: valve actuator malfunction, problems with the electrical control circuit. Estimated repair cost: $33–167.

Severity
⚠️ Medium
Can you drive?
Yes, but get it checked soon
Approx. repair cost
$33–167 (est.)

Symptoms

  • Deterioration of engine performance
  • Increased fuel consumption
  • Check Engine Light Illuminates
  • Possible engine vibrations
  • Reduced engine power

Causes

  • Valve actuator malfunction
  • Problems with the electrical control circuit
  • Mechanical valve jamming
  • Wiring harness damage
  • Problems with the engine control unit

How to Fix

  1. Check valve control circuit
  2. Check the functionality of the actuator
  3. Clean or replace a stuck valve
  4. Check and replace wiring harness if necessary
  5. Flash or replace the engine control unit if necessary

Related codes

P12F0P12F1P12F3

FAQ

What does the P12F2 code mean?

P12F2 is an OBD-II diagnostic trouble code that indicates: Cylinder Deactivation Exhaust Flow Valve Actuator Performance Bank 1

What causes a P12F2 error code?

The most common causes of P12F2 include: Valve actuator malfunction; Problems with the electrical control circuit; Mechanical valve jamming; Wiring harness damage.

How do I fix a P12F2 diagnostic trouble code?

To fix P12F2: Check valve control circuit. Check the functionality of the actuator. Clean or replace a stuck valve. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P12F2?

Yes, but get it checked soon

How much does it cost to fix P12F2?

The estimated repair cost for P12F2 is $33–167. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat