P22FA

NOx Sensor Performance - Slow Response High to Low Bank 1 Sensor 1

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$167–444 (est.)

Symptoms

Increased fuel consumption
Check Engine Light Illuminates
Reduced engine power
Increased emissions of harmful substances
Unstable engine operation at idle

Causes

Faulty NOx sensor
NOx sensor contamination
Problems with wiring to the sensor
Engine control unit malfunction
Problems with the SCR system

How to Fix

Check the condition and connections of the NOx sensor
Test the sensor electrical circuit
Clean or replace NOx sensor
Check the operation of the SCR system
Update the engine control unit firmware

Related codes

P229F P2200 P2201