P224B

NOx Sensor Heater Resistance Bank 1 Sensor 2

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$133–278 (est.)

Symptoms

Check Engine Light Is On
Possible loss of engine power
Increased fuel consumption
Unstable engine operation at idle
Reduced efficiency of the exhaust gas cleaning system

Causes

NOx sensor malfunction (heater internal damage)
Open or short circuit in the heater circuit
Poor contact in the sensor connector
Wiring harness damage
Malfunction of the engine control unit (rare)

How to Fix

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

Related codes

P224A P224C P2200