OBD Guide
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P12F6

Cylinder Deactivation Exhaust Flow Valve Open Position Bank 2

P12F6 is an OBD-II diagnostic trouble code meaning: Cylinder Deactivation Exhaust Flow Valve Open Position Bank 2. Common causes: exhaust gas flow control valve malfunction, problems with wiring to the valve. Estimated repair cost: $28–89.

Severity
⚠️ Medium
Can you drive?
Yes, but get it checked soon
Approx. repair cost
$28–89 (est.)

Symptoms

  • Deterioration of vehicle dynamics
  • Increased fuel consumption
  • Unstable engine operation at idle
  • Check Engine Light Illuminates
  • Possible engine vibrations

Causes

  • Exhaust gas flow control valve malfunction
  • Problems with wiring to the valve
  • Mechanical valve jamming
  • Engine control unit malfunction
  • Depressurization of the vacuum system

How to Fix

  1. Check the condition of the exhaust gas flow control valve
  2. Check the integrity of wiring and connectors
  3. Check the operation of the vacuum system
  4. Test valve coil resistance
  5. Replace valve if necessary

Related codes

P12F5P12F7P12F8

FAQ

What does the P12F6 code mean?

P12F6 is an OBD-II diagnostic trouble code that indicates: Cylinder Deactivation Exhaust Flow Valve Open Position Bank 2

What causes a P12F6 error code?

The most common causes of P12F6 include: Exhaust gas flow control valve malfunction; Problems with wiring to the valve; Mechanical valve jamming; Engine control unit malfunction.

How do I fix a P12F6 diagnostic trouble code?

To fix P12F6: Check the condition of the exhaust gas flow control valve. Check the integrity of wiring and connectors. Check the operation of the vacuum system. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P12F6?

Yes, but get it checked soon

How much does it cost to fix P12F6?

The estimated repair cost for P12F6 is $28–89. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat