HO2S Heater Control Circuit Range/Performance Bank 2 Sensor 2

Descripción

This code means the heater circuit for the second oxygen sensor (O2 sensor) on the second bank of cylinders is not functioning correctly. The O2 sensor needs to be hot to work, and a faulty heater can cause the engine to run inefficiently.

Pasos de reparación

1. 1 Check the fuse for the O2 sensor heater circuit and replace it if blown.
2. 2 Inspect the wiring and connector at the Bank 2 Sensor 2 O2 sensor for damage, corrosion, or loose connections, and repair as needed.
3. 3 Measure the resistance of the O2 sensor heater element with a multimeter to verify it is within specification.
4. 4 Test the voltage supply and ground at the O2 sensor heater connector with the key on to confirm proper circuit operation.
5. 5 Replace the Bank 2 Sensor 2 (downstream) O2 sensor if the heater element has failed or is out of range.
6. 6 Inspect the wiring harness between the ECM and the O2 sensor for chafing, shorts, or open circuits, and repair as needed.
7. 7 Have the engine control module (ECM) tested and reprogrammed or replaced if all other components and wiring test normal.

Diagnóstico y costo