P225C

NOx Sensor Performance - Signal Biased/Stuck High Bank 1 Sensor 1

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$56–167 (est.)

Symptoms

Check Engine light comes on
Increased NOx emissions
Reduced engine power
Increased fuel consumption
Unstable engine operation

Causes

NOx sensor malfunction
Damage to wiring or connectors
ECU software error
NOx sensor contamination
Problems with the SCR (AdBlue) system

How to Fix

Check the condition of the NOx sensor and its connectors
Check the integrity of wiring and connections
Read error codes and sensor data using a scanner
If necessary, replace the NOx sensor
Update ECU software

Related codes

P225D P2200 P2201