P23B6

NOx Sensor Supply Voltage Circuit 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
Deterioration of environmental indicators
Possible reduction in engine power
Increased fuel consumption
Errors in the SCR system (if installed)

Causes

NOx sensor malfunction
Open or short circuit in the power supply
Problems with sensor connectors
Engine control unit malfunction
Problems with the SCR system

How to Fix

Check the integrity of the sensor power supply circuit
Inspect the connectors and contacts of the sensor
Check the functionality of the NOx sensor
Check the operation of the SCR system (if installed)
Scan the control unit for additional errors

Related codes

P23B7 P23B5 P2200