P22FD

NOx Sensor Performance - Slow Response High to Low Bank 1 Sensor 2

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
Problems with passing environmental tests

Causes

NOx sensor contamination
Problems in the sensor electrical circuit
Malfunction of the NOx sensor itself
Problems with the exhaust gas recirculation (EGR) system
Engine control unit malfunction

How to Fix

Check NOx sensor electrical circuit
Clean the sensor from dirt
Check the operation of the EGR system
Replace NOx sensor if necessary
Flash the engine control unit (if necessary)

Related codes

P2200 P2201 P229F