P23B8

NOx Sensor Heater Sense Circuit Low 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 Is On
Reduced engine power
Increased fuel consumption
Dips during acceleration
Unstable idling

Causes

NOx sensor malfunction
Open or short circuit in wiring
Poor contact in connectors
Control module malfunction
Contact corrosion

How to Fix

Check the integrity of wiring and connectors
Measure NOx sensor heater resistance
Check power and ground circuit
Replace NOx sensor if necessary
Reset the error and check the system

Related codes

P23B7 P23B9 P23BA