U05A9

NOx Sensor C Received Invalid Data From ECM/PCM

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$167–444 (est.)

Symptoms

Check Engine light comes on
Reduced engine power
Increased fuel consumption
Problems with passing technical inspection
Possible transition to emergency mode

Causes

NOx C sensor malfunction
Damage to the wiring to the NOx sensor
Poor contact in connectors
Software error in the ECU
Sensor power problems

How to Fix

Check the condition of the wiring and connectors of the NOx C sensor
Read error codes and sensor data using a scanner
Check the power supply and ground of the sensor
Replace NOx C sensor if necessary
Update the ECU firmware if appropriate service bulletins are available

Related codes

U05AA U05AB P2200