P22A6

NOx Sensor Heater Sense Circuit Bank 1 Sensor 2

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$167–333 (est.)

Symptoms

Check Engine Light Is On
Reduced engine power
Increased fuel consumption
Unstable engine idling
Dips during acceleration

Causes

Open or short circuit in the NOx sensor heater circuit
Malfunction of the NOx sensor itself
Problems with the wiring harness or connectors
Engine control unit (ECU) malfunction
Corroded contacts or damaged wiring

How to Fix

Check the continuity of the NOx sensor heater circuit
Inspect connectors and wiring harness for damage
Check sensor heater resistance
Replace NOx sensor if necessary
Reset the error code and check if it returns

Related codes

P22A5 P22A7 P2200