OBD Guide

P029E

Cylinder 2 - Fuel Trim at Max Limit

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

Symptoms

  • Unstable engine operation
  • Power reduction
  • Increased fuel consumption
  • Misfire in cylinder 2

Causes

  • Dirty or faulty fuel injector for cylinder 2
  • Vacuum leak in the area of cylinder 2
  • Oxygen sensor malfunction
  • Cylinder 2 injector wiring harness problems
  • Low fuel pressure
  • EGR system malfunction
  • Engine wear (compression problems)

How to Fix

  1. Check the condition of the fuel injector of cylinder 2
  2. Check the tightness of the intake tract for leaks
  3. Check the operation of the oxygen sensors and mass air flow sensor
  4. Check fuel pressure
  5. Check compression in cylinder 2
  6. Check the condition of the spark plug and coil of cylinder 2
  7. Check the operation of the EGR system

Related codes

Error P029E by Vehicle Brand