P22A5

NOx Sensor Heater Control Circuit High Bank 1 Sensor 2

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$167–444 (est.)

Symptoms

Check Engine light comes on
Deterioration of the exhaust gas cleaning system
Possible reduction in engine power
Increased fuel consumption
Unstable engine idling

Causes

NOx sensor heater circuit short circuit
Heater control circuit open
NOx sensor malfunction
Damaged wiring harness or connectors
Problems with the engine control unit

How to Fix

Check the continuity of the NOx sensor heater circuit
Inspect connectors and wiring for damage
Check the resistance of the sensor heating element
If necessary, replace the NOx sensor
Reset the fault code and check if it returns

Related codes

P22A4 P2201 P2200