P22A7

NOx Sensor Heater Sense Circuit Range/Performance 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
Reduced engine power
Increased fuel consumption
Problems with passing technical inspection
Possible transition to emergency mode

Causes

NOx sensor heating element malfunction
Open or short circuit in the heater circuit
Poor contact in the sensor connector
Faulty heater circuit relay or fuse
Problems with the engine control unit

How to Fix

Check the integrity of the heater circuit (resistance, voltage)
Inspect connectors and wiring for damage
Check fuses and relays associated with the NOx system
If necessary, replace the NOx sensor
Reset the error and check the system operation

Related codes

P2200 P2201 P229F