P2222

NOx Sensor Heater Sense Circuit Range/Performance Bank 2

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$56–167 (est.)

Symptoms

Check Engine light comes on
Increased fuel consumption
Reduced engine power
Dips during acceleration
Software speed limit

Causes

Open or short circuit in the heater circuit
NOx Bank 2 sensor malfunction
Problems with the relay or circuit fuse
Corroded contacts or damaged wiring
Engine ECU errors

How to Fix

Check the integrity of the heater circuit
Diagnose the status of the NOx sensor
Check system fuses and relays
Inspect connectors and wiring harness
If necessary, replace the NOx sensor

Related codes

P2221 P2223 P2200