P23B5

NOx Sensor Heater Sense Circuit Range/Performance 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
Problems with passing technical inspection
Possible misfires

Causes

NOx sensor malfunction
Open or short circuit in the heater circuit
Poor contact in the sensor connector
Wiring harness damage
Problems with the engine control unit

How to Fix

Check the continuity of the sensor heater circuit
Inspect connectors and wiring for damage
Check sensor heater resistance
Replace NOx sensor if necessary
Reset the error code and check the system

Related codes

P23B6 P23B4 P2200