U05A2

NOx Sensor B Received Invalid Data From ECM/PCM

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$56–167 (est.)

Symptoms

Check Engine light comes on
Deterioration of engine performance
Increased fuel consumption
Dips during acceleration
Possible problems starting the engine

Causes

NOx B sensor malfunction
Problems with wiring to the sensor
Engine control unit malfunction
Software failures in ECM/PCM
Corrosion or oxidation of contacts

How to Fix

Check the status of NOx sensor B
Check the integrity of wiring and contacts
Scan the control unit for errors
Check for ECM/PCM software updates
If necessary, replace NOx B sensor

Related codes

U05A1 U05A3 U05A0