P23BF

NOx Sensor Performance - Slow Response Low to High Bank 1 Sensor 3

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$167–444 (est.)

Symptoms

Increased fuel consumption
Check Engine Light Illuminates
Reduced engine power
Increased NOx emissions
Rough engine idling

Causes

NOx sensor malfunction
NOx sensor contamination
Problems with wiring to the sensor
Low quality urea (AdBlue)
Engine control unit malfunction

How to Fix

Check the status of the NOx sensor
Check the integrity of wiring and connectors
Clean the sensor from dirt (if possible)
Replace NOx sensor if necessary
Check the quality and level of AdBlue fluid

Related codes

P229F P2200 P2201