U030D

Software Incompatibility With NOx Sensor A

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 inspection due to emissions
Errors in the operation of the SCR (selective catalytic reduction) system

Causes

Incompatible ECU and NOx sensor software versions
Incorrect programming after sensor replacement
Physical damage to the NOx sensor
Problems with wiring to the sensor
Malfunction of the control unit itself

How to Fix

Check ECU and NOx sensor software versions
Update or reflash the software according to requirements
Check the integrity of the sensor and its connection
Conduct wiring and connector diagnostics
If necessary, replace the NOx sensor

Related codes

U030C U030E U031D