P22FF

SCR NOx Catalyst Inlet Temperature Too Low

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$56–278 (est.)

Symptoms

Check Engine light comes on
Reduced engine power
Increased urea consumption (AdBlue)
Increased NOx emissions
Possible restrictions on engine operation in emergency mode

Causes

SCR temperature sensor malfunction
Problems with the exhaust system (leaks, damage)
Low coolant temperature
Malfunction of the urea injection system
SCR catalytic converter clogged

How to Fix

Check the readings of the SCR temperature sensors
Inspect the exhaust system for leaks
Check the operation of the urea injection system
Diagnose the condition of the catalytic converter
If necessary, replace temperature sensors or SCR system components

Related codes

P2200 P2201 P229F