P23C1

NOx Sensor Performance - Sensing Element Bank 1 Sensor 3

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$89–278 (est.)

Symptoms

Check Engine light comes on
Reduced engine power
Increased fuel consumption
Unstable engine operation at idle
Possible exhaust odor

Causes

NOx sensor malfunction
Damaged NOx sensor wiring or connectors
Exhaust leak
Malfunction of the catalytic converter
Problems with the engine ECU (electronic control unit)

How to Fix

Check the NOx sensor wiring and connectors for damage or corrosion.
Check the NOx sensor to specifications using a multimeter.
Replace the NOx sensor if it is faulty.
Check the catalytic converter for damage or blockage.
Check the engine ECU for errors and update the software if necessary.

Related codes

P23C0 P23C2 P23C3