OBD Guide

P236D

Cylinder 12 Pressure Variation Low

P236D is an OBD-II diagnostic trouble code meaning: Cylinder 12 Pressure Variation Low. Common causes: wear of piston rings in cylinder 12, damage to cylinder valves. Estimated repair cost: $6–111.

Severity
⚠️ Medium
Can you drive?
Yes, but get it checked soon
Approx. repair cost
$6–111 (est.)

Symptoms

  • Reduced engine power
  • Increased fuel consumption
  • Unstable engine operation
  • Misfire in cylinder 12
  • Check Engine light comes on

Causes

  • Wear of piston rings in cylinder 12
  • Damage to cylinder valves
  • Spark plug fault
  • Problems with the fuel injector
  • Compression leak in cylinder

How to Fix

  1. Check compression in cylinder 12
  2. Inspect the spark plug and replace if necessary
  3. Check the condition of the fuel injector
  4. Diagnose the condition of piston rings and valves
  5. If necessary, repair the engine

Related codes

Error P236D by Vehicle Brand

FAQ

What does the P236D code mean?

P236D is an OBD-II diagnostic trouble code that indicates: Cylinder 12 Pressure Variation Low

What causes a P236D error code?

The most common causes of P236D include: Wear of piston rings in cylinder 12; Damage to cylinder valves; Spark plug fault; Problems with the fuel injector.

How do I fix a P236D diagnostic trouble code?

To fix P236D: Check compression in cylinder 12. Inspect the spark plug and replace if necessary. Check the condition of the fuel injector. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P236D?

Yes, but get it checked soon

How much does it cost to fix P236D?

The estimated repair cost for P236D is $6–111. Actual cost depends on your vehicle, location, and labor rates.

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