OBD Guide

P2351

Cylinder 9 Combustion Performance

Severity
⚠️ Medium
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$6–56 (est.)

Symptoms

  • Unstable engine operation
  • Power reduction
  • Increased fuel consumption
  • Engine vibration
  • Check Engine Light Illuminates

Causes

  • Faulty spark plug in cylinder 9
  • Problems with the fuel injector of cylinder 9
  • Low compression in cylinder 9
  • Ignition coil malfunction
  • Problems with wiring to cylinder 9

How to Fix

  1. Check the condition of the spark plug in cylinder 9
  2. Diagnose fuel injector operation
  3. Measure the compression in the cylinder
  4. Check ignition coil and wiring
  5. If necessary, replace faulty components

Related codes

Error P2351 by Vehicle Brand