P23BC

NOx Sensor Calibration Memory Bank 1 Sensor 3

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$56–167 (est.)

Symptoms

Check Engine light comes on
Increased fuel consumption
Reduced engine power
Increased NOx emissions
Incorrect NOx sensor readings

Causes

NOx sensor malfunction
Problems with wiring or connectors
Sensor contamination
Errors in ECU software
Mechanical damage to the sensor

How to Fix

Check the integrity of wiring and connectors
Clean the sensor from dirt
Check and update ECU software
Replace NOx sensor if necessary
Check the operation of the SCR system

Related codes

P23BD P23BE P23BF