O2 Sensor Heater Circuit

Descripción

This code points to a problem with the heating element of the oxygen sensor in Bank 1, Sensor 2. This heater helps the sensor warm up quickly so it can start sending accurate readings to the engine computer sooner.

Pasos de reparación

1. 1 Check the fuse for the oxygen sensor heater circuit and replace it if blown.
2. 2 Inspect the wiring and connector at the Bank 1, Sensor 2 oxygen sensor (downstream, after the catalytic converter) for damage, corrosion, or loose connections.
3. 3 Test the oxygen sensor heater circuit resistance with a multimeter; it should typically read between 2-30 ohms depending on the vehicle.
4. 4 Clear the code with an OBD-II scanner and drive the vehicle to see if the code returns.
5. 5 Replace the Bank 1, Sensor 2 oxygen sensor if the heater circuit resistance is out of specification.
6. 6 Repair or replace any damaged wiring or connectors in the O2 sensor heater circuit.
7. 7 Have the engine control module (ECM) tested by a professional if all other components check out and the code persists.

Diagnóstico y costo