P20F1

SCR NOx Pre-Catalyst - Over Temperature Bank 2

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$33–167 (est.)

Symptoms

Check Engine light comes on
Reduced engine power
Increased fuel consumption
Unusual odors from the exhaust system
SCR system error message on dashboard

Causes

SCR temperature sensor malfunction
Clogged or damaged catalytic converter
Problems with AdBlue supply
AdBlue injection system malfunction
Temperature sensor wiring harness damaged

How to Fix

Check the SCR temperature sensor readings
Inspect the AdBlue injection system for leaks or blockages
Check the condition of the catalytic converter
Diagnose and, if necessary, replace the temperature sensor
Check the integrity of the sensor wiring harness

Related codes

P20EE P20F0 P20F2