P23BD

NOx Sensor Performance - Signal Biased/Stuck High 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
Reduced engine power
Increased fuel consumption
Dips during acceleration
Unstable engine idling

Causes

NOx sensor malfunction
Open or short circuit in the sensor circuit
NOx sensor contamination
Problems with the EGR system
Malfunction of the catalytic converter

How to Fix

Check the condition and connections of the NOx sensor
Test the sensor circuit for open and short circuit
Clean or replace NOx sensor
Check the operation of the EGR system
Diagnose the condition of the catalytic converter

Related codes

P23BE P23BF P23A0