OBD Guide
ENFRDEESPT

P12FD

Cylinder Deactivation Exhaust Flow Valve Stuck Open Bank 2

P12FD is an OBD-II diagnostic trouble code meaning: Cylinder Deactivation Exhaust Flow Valve Stuck Open Bank 2. Common causes: mechanical valve sticking, solenoid drive malfunction. Estimated repair cost: $33–167.

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

Symptoms

  • Reduced engine power
  • Increased fuel consumption
  • Uneven engine operation
  • Check Engine Light Is On
  • Noises from the exhaust system

Causes

  • Mechanical valve sticking
  • Solenoid drive malfunction
  • Wiring problems
  • Valve contamination
  • Engine control unit malfunction

How to Fix

  1. Check the condition of the valve and its mechanical mobility
  2. Check the electromagnetic drive and its resistance
  3. Check the integrity of wiring and connectors
  4. Clean or replace valve
  5. If necessary, replace the entire valve assembly

Related codes

P12FCP12FEP12FF

FAQ

What does the P12FD code mean?

P12FD is an OBD-II diagnostic trouble code that indicates: Cylinder Deactivation Exhaust Flow Valve Stuck Open Bank 2

What causes a P12FD error code?

The most common causes of P12FD include: Mechanical valve sticking; Solenoid drive malfunction; Wiring problems; Valve contamination.

How do I fix a P12FD diagnostic trouble code?

To fix P12FD: Check the condition of the valve and its mechanical mobility. Check the electromagnetic drive and its resistance. Check the integrity of wiring and connectors. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P12FD?

Yes, but get it checked soon

How much does it cost to fix P12FD?

The estimated repair cost for P12FD is $33–167. Actual cost depends on your vehicle, location, and labor rates.

FRDEESPT

See also: Russian version · NationStat