P23AB

NOx Sensor Processor Performance Bank 1 Sensor 3

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$167–444 (est.)

Symptoms

Check Engine light comes on
Deterioration of vehicle dynamics
Increased fuel consumption
Unstable engine idling
Possible problems with passing technical inspection

Causes

NOx sensor malfunction
Damage to the sensor wiring harness
Corrosion of contacts or connectors
Sensor power problems
Errors in ECU software

How to Fix

Check the integrity of the NOx sensor wiring harness
Check the supply voltage and ground of the sensor
Clean sensor connector contacts
Scan the ECU for software updates
If necessary, replace the NOx sensor

Related codes

P229F P2201 P2200