P225A

NOx Sensor Calibration Memory 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
Reduced engine power
Increased fuel consumption
Problems with passing technical inspection
Incorrect operation of the SCR system

Causes

NOx sensor malfunction
Problems with sensor wiring or connectors
Errors in ECU software
NOx sensor contamination
Calibration failed after replacing sensor

How to Fix

Check the condition of the NOx sensor and its connectors
Check the integrity of the wiring to the sensor
Read sensor parameters using diagnostic equipment
Perform sensor calibration procedure
If necessary, replace the NOx sensor

Related codes

P2200 P2201 P229F