P220B

NOx Sensor Supply Voltage Circuit Bank 1 Sensor 2

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$56–167 (est.)

Symptoms

Check Engine Light Is On
Deterioration of vehicle dynamics
Increased fuel consumption
Dips during acceleration
Unstable engine idling

Causes

Open or short circuit in the NOx sensor power supply circuit
NOx sensor malfunction
Poor contact in the sensor connector
Wiring harness damage
Engine control unit malfunction

How to Fix

Check the integrity of the sensor wiring and connectors
Measure the voltage in the sensor power circuit
Check NOx sensor resistance
Replace NOx sensor if necessary
Scan the engine control module for additional errors

Related codes

P220A P220C P220D