OBD Guide

P24FE

SCR Catalyst Incorrect

Severity
🔴 High
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$167–556 (est.)

Symptoms

  • Check Engine light comes on
  • Reduced engine power
  • Increased fuel consumption
  • Possible ammonia smell from the exhaust system
  • The system may go into emergency mode

Causes

  • Clogged or damaged SCR catalyst
  • Low level or poor quality of AdBlue reagent
  • NOx sensor malfunction
  • Problems with the AdBlue dosing module
  • Malfunction of the catalyst heating element

How to Fix

  1. Check the level and quality of AdBlue reagent
  2. Diagnose the condition of the SCR catalyst
  3. Check the operation of NOx sensors and their wiring
  4. Test the AdBlue dosing module
  5. If necessary, replace the SCR catalyst

Related codes

Error P24FE by Vehicle Brand