OBD Guide

P03D6

Cylinder 7 Pressure Too Low

P03D6 is an OBD-II diagnostic trouble code meaning: Cylinder 7 Pressure Too Low. Common causes: spark plug fault, problems with the fuel injector. Estimated repair cost: $56–167.

Severity
⚠️ Medium
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$56–167 (est.)

Symptoms

  • Misfire in cylinder 7
  • Reduced engine power
  • Unstable idle
  • Increased fuel consumption

Causes

  • Spark plug fault
  • Problems with the fuel injector
  • Compression leak (cylinder head gasket, rings)
  • Ignition system malfunction
  • Malfunction of the cylinder pressure sensor

How to Fix

  1. Check the spark plug in cylinder 7
  2. Check the condition of the fuel injector
  3. Measure compression in cylinder 7
  4. Diagnose the ignition system
  5. Check cylinder pressure sensor

Related codes

Error P03D6 by Vehicle Brand

FAQ

What does the P03D6 code mean?

P03D6 is an OBD-II diagnostic trouble code that indicates: Cylinder 7 Pressure Too Low

What causes a P03D6 error code?

The most common causes of P03D6 include: Spark plug fault; Problems with the fuel injector; Compression leak (cylinder head gasket, rings); Ignition system malfunction.

How do I fix a P03D6 diagnostic trouble code?

To fix P03D6: Check the spark plug in cylinder 7. Check the condition of the fuel injector. Measure compression in cylinder 7. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P03D6?

Limited driving only, diagnose soon

How much does it cost to fix P03D6?

The estimated repair cost for P03D6 is $56–167. Actual cost depends on your vehicle, location, and labor rates.

See also: Russian version · NationStat