OBD Guide

P03CE

Cylinder 6 Pressure Variation Low

P03CE is an OBD-II diagnostic trouble code meaning: Cylinder 6 Pressure Variation Low. Common causes: low compression in cylinder 6 (wear of rings, valves), clogged fuel injector of cylinder 6. Estimated repair cost: $33–444.

Severity
⚠️ Medium
Can you drive?
Do not drive — repair immediately
Approx. repair cost
$33–444 (est.)

Symptoms

  • Check Engine light on
  • Engine vibration, especially at medium speeds
  • Misfire in cylinder 6
  • Reduced engine power and thrust
  • Increased fuel consumption

Causes

  • Low compression in cylinder 6 (wear of rings, valves)
  • Clogged fuel injector of cylinder 6
  • Bad spark plug or coil
  • Stuck or burnt valves
  • Pressure sensor malfunction (false low reading)

How to Fix

  1. Carry out a compression test on cylinder 6 and compare with the norm
  2. Check the spark plug and coil of cylinder 6
  3. Perform injector balance test - check cylinder 6 injector
  4. If compression is low, perform a cylinder leak-down test.
  5. Check the pressure sensor of cylinder 6 for accuracy of readings
  6. Eliminate the cause and reset error codes

Related codes

Error P03CE by Vehicle Brand

FAQ

What does the P03CE code mean?

P03CE is an OBD-II diagnostic trouble code that indicates: Cylinder 6 Pressure Variation Low

What causes a P03CE error code?

The most common causes of P03CE include: Low compression in cylinder 6 (wear of rings, valves); Clogged fuel injector of cylinder 6; Bad spark plug or coil; Stuck or burnt valves.

How do I fix a P03CE diagnostic trouble code?

To fix P03CE: Carry out a compression test on cylinder 6 and compare with the norm. Check the spark plug and coil of cylinder 6. Perform injector balance test - check cylinder 6 injector. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P03CE?

Do not drive — repair immediately

How much does it cost to fix P03CE?

The estimated repair cost for P03CE is $33–444. Actual cost depends on your vehicle, location, and labor rates.

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