O2 Sensor Circuit No Activity Detected

Descripción

This code means the oxygen sensor isn't sending any signal at all, or the signal is too weak to be detected. The car's computer relies on this sensor to monitor exhaust and adjust fuel, so no signal means it can't do its job.

Pasos de reparación

1. 1 Inspect the O2 sensor electrical connector (Bank 2, Sensor 1) for looseness, corrosion, or damage, and clean or reseat the connector as needed.
2. 2 Check the O2 sensor wiring harness for signs of damage, chafing, or open circuits between the sensor and the ECM.
3. 3 Test the O2 sensor voltage output using a multimeter or scan tool to confirm there is no activity or signal fluctuation.
4. 4 Check for exhaust leaks near the O2 sensor location that could affect sensor readings.
5. 5 Replace the faulty oxygen sensor (Bank 2, Sensor 1) if testing confirms no signal activity.
6. 6 Repair or replace any damaged wiring or connectors in the O2 sensor circuit if open circuits or breaks are found.
7. 7 Have the engine control module (ECM) inspected and tested by a professional if the new sensor and wiring check out but the code persists.

Diagnóstico y costo