P2221

NOx Sensor Heater Sense Circuit Bank 2

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$56–167 (est.)

Symptoms

Check Engine Light Is On
Reduced engine power
Deteriorating fuel economy
Problems with passing technical inspection (due to increased emissions)
Possible misfires

Causes

NOx sensor malfunction
Open or short circuit in heating circuit
Poor contact in the sensor connector
Problems with the engine control unit
Contact corrosion

How to Fix

Check the integrity of the sensor heating circuit
Inspect connectors and contacts for corrosion
Check the resistance of the sensor heating element
If necessary, replace the NOx sensor
Scan the system for other errors

Related codes

P2220 P2222 P2201