P2212

NOx Sensor Heater Sense Circuit Intermittent Bank 1 Sensor 1

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$133–278 (est.)

Symptoms

Check Engine Light Is On
Possible problems starting the engine in cold weather
Reduced engine power
Increased fuel consumption
Unstable engine idling

Causes

Open or short circuit in the heating circuit of the NOx sensor
Oxidized or corroded connector pins
Sensor heating element malfunction
Problems with the wiring harness (frayed or damaged wires)
Malfunction of the engine control unit (rare)

How to Fix

Check the integrity of wires and contacts in the heater circuit
Clean the contacts of the NOx sensor connector
Check the resistance of the sensor heating element
If necessary, replace the NOx sensor
Check the operation of the system after repair

Related codes

P2200 P2201 P2213