OBD Guide

P242F

Particulate Filter Restriction - Ash Accumulation Bank 1

Severity
🔴 High
Can you drive?
Do not drive — repair immediately
Approx. repair cost
$167–556 (est.)

Symptoms

  • Reduced engine power
  • Increased fuel consumption
  • Check Engine light comes on
  • Problems starting the engine
  • Unstable engine idling

Causes

  • Long-term vehicle operation without DPF regeneration
  • Use of low-quality fuel
  • Malfunction of the DPF regeneration system
  • Mechanical damage to the particulate filter
  • Excessive engine wear

How to Fix

  1. Check the condition of the particulate filter
  2. Perform forced DPF regeneration
  3. Clean or replace the particulate filter
  4. Check the operation of the regeneration system
  5. Replace the fuel filter and use high-quality fuel

Related codes

Error P242F by Vehicle Brand