P23B0

NOx Sensor Circuit Intermittent 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 Is On
Increased fuel consumption
Reduced engine power
Unstable engine operation
Increased level of harmful emissions

Causes

Damaged NOx sensor wiring harness
Oxidation or corrosion of sensor connectors
NOx sensor malfunction
Sensor circuit grounding problems
Engine control unit malfunction

How to Fix

Check the integrity of the NOx sensor wiring harness
Clean sensor connector contacts
Check the resistance and voltage in the sensor circuit
Replace NOx sensor if necessary
Check and update engine control unit software

Related codes

P23B1 P23B2 P23B3