O2 Sensor Circuit No Activity Detected

Descripción

This code indicates that the engine computer is not detecting any activity from the oxygen sensor located in Bank 1, Sensor 2. This sensor's job is to measure the amount of oxygen in the exhaust to help control fuel mixture, and no readings means it's not working.

Pasos de reparación

1. 1 Check for exhaust leaks near the catalytic converter and downstream oxygen sensor (Bank 1, Sensor 2) by visually inspecting for soot marks or damaged gaskets.
2. 2 Inspect the wiring and electrical connector for the Bank 1, Sensor 2 oxygen sensor for damage, corrosion, fraying, or loose connections.
3. 3 Test the oxygen sensor signal voltage using a multimeter or scan tool to confirm the sensor is stuck and not switching between rich and lean readings.
4. 4 Check the oxygen sensor heater circuit fuse and relay to ensure the sensor is receiving proper power.
5. 5 Replace the Bank 1, Sensor 2 oxygen sensor (downstream, post-catalytic converter) if the sensor shows no activity or a flat-line voltage.
6. 6 Repair any damaged wiring or connectors in the oxygen sensor circuit if issues were found during inspection.
7. 7 Have the engine control module (ECM) inspected and tested by a professional if the new sensor still shows no activity and all wiring checks out.

Diagnóstico y costo