OBD Guide

P02A2

Cylinder 3 - 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
  • Increased fuel consumption
  • Power Loss
  • Misfire in cylinder 3

Causes

  • Dirty or faulty fuel injectors
  • Air leaks in the intake manifold
  • Malfunction of the oxygen sensor (lambda probe)
  • Problems with the Exhaust Gas Recirculation (EGR) system
  • Malfunction of the mass air flow sensor (MAF)
  • Dirty air filter

How to Fix

  1. Check fuel injectors for contamination or malfunction
  2. Inspect the intake manifold for air leaks
  3. Check the operation of the oxygen sensor (lambda probe)
  4. Diagnose the EGR system for faults
  5. Check the condition of the mass air flow sensor (MAF)
  6. Replace the air filter if it is dirty

Related codes

Error P02A2 by Vehicle Brand