P224A

NOx Sensor Heater Resistance Bank 1 Sensor 1

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$89–278 (est.)

Symptoms

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

Causes

Open or short circuit in the NOx sensor heater circuit
Faulty NOx sensor
Damage to the wiring harness to the sensor
Problems with the engine control unit
Corrosion of contacts or connectors

How to Fix

Check the continuity of the NOx sensor heater circuit
Measure the resistance of the sensor heater
Inspect connectors and wiring harness for damage
If necessary, replace the NOx sensor
Reset the error code and check the system operation

Related codes

P224B P2200 P2201