OBD Guide

P02AF

Cylinder 6 - Fuel Trim at Min Limit

Severity
⚠️ Medium
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$33–167 (est.)

Symptoms

  • Increased fuel consumption
  • Smell of gasoline in exhaust fumes
  • Unstable engine operation
  • Cylinder 6 spark plug fouled
  • Check Engine Light Illuminates

Causes

  • Cylinder 6 injector leaking (leaking valve)
  • Increased fuel pressure on cylinder 6
  • Fuel pressure regulator malfunction
  • Nozzle contamination (stuck in open position)
  • Incorrect ECU calibration

How to Fix

  1. Read codes and check for adjacent codes
  2. Check the cylinder 6 injector for leakage (leakage test with the engine off)
  3. Measure the pressure in the fuel rail
  4. Carry out ultrasonic cleaning of the nozzle
  5. Check fuel pressure regulator
  6. If a leak is confirmed, replace the injector of cylinder 6

Related codes

Error P02AF by Vehicle Brand