OBD Guide

P236F

Cylinder 12 Combustion Performance

P236F is an OBD-II diagnostic trouble code meaning: Cylinder 12 Combustion Performance. Common causes: faulty spark plug in cylinder 12, problems with the fuel injector of cylinder 12. Estimated repair cost: $17–89.

Severity
⚠️ Medium
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$17–89 (est.)

Symptoms

  • Loss of engine power
  • Unstable engine idling
  • Increased fuel consumption
  • Popping sounds in the exhaust system
  • Check Engine light comes on

Causes

  • Faulty spark plug in cylinder 12
  • Problems with the fuel injector of cylinder 12
  • Low compression in cylinder 12
  • Ignition coil malfunction
  • Problems with the oxygen sensor

How to Fix

  1. Check the condition of the spark plug in cylinder 12
  2. Diagnose fuel injector operation
  3. Measure the compression in the cylinder
  4. Check ignition coil and wires
  5. Scan oxygen sensors for errors

Related codes

Error P236F by Vehicle Brand

FAQ

What does the P236F code mean?

P236F is an OBD-II diagnostic trouble code that indicates: Cylinder 12 Combustion Performance

What causes a P236F error code?

The most common causes of P236F include: Faulty spark plug in cylinder 12; Problems with the fuel injector of cylinder 12; Low compression in cylinder 12; Ignition coil malfunction.

How do I fix a P236F diagnostic trouble code?

To fix P236F: Check the condition of the spark plug in cylinder 12. Diagnose fuel injector operation. Measure the compression in the cylinder. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P236F?

Limited driving only, diagnose soon

How much does it cost to fix P236F?

The estimated repair cost for P236F is $17–89. Actual cost depends on your vehicle, location, and labor rates.

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