P20EC

SCR NOx Catalyst - Over Temperature Bank 1

Severity

🔴 High

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$56–389 (est.)

Symptoms

Check Engine Light Illuminates
Reduced engine power
Possible transition to emergency mode
Increased fuel consumption
Noticeable increase in exhaust system temperature

Causes

SCR temperature sensor malfunction
Problems with the urea injection system (AdBlue)
Clogged or damaged SCR catalyst
SCR control module malfunction
Problems with sensor wiring

How to Fix

Check the level and quality of AdBlue reagent
Diagnose the urea injection system
Check the condition of the SCR catalyst
Test temperature sensors and their circuits
Scan for errors in the SCR module

Related codes

P20EE P20E8 P20E9