O2 Sensor Circuit High Voltage

Descripción

This code means the oxygen sensor in your exhaust is sending a signal that's too high. This sensor helps your car's computer figure out how much fuel to use, so a bad signal can mess up the fuel mixture.

Pasos de reparación

1. 1 Check the O2 sensor wiring harness and connector for damage, corrosion, or loose connections and repair as needed.
2. 2 Inspect the exhaust system for leaks before the O2 sensor location (Bank 2, Sensor 1) and repair any leaks found.
3. 3 Test the O2 sensor voltage output using a multimeter or scan tool to verify it is stuck high (above 0.9V) rather than cycling normally.
4. 4 Check for related trouble codes that may indicate a rich fuel condition causing the high voltage reading.
5. 5 Replace the Bank 2, Sensor 1 oxygen sensor if it is confirmed faulty or stuck at high voltage.
6. 6 Inspect the O2 sensor wiring for shorts to voltage, particularly where the harness runs near hot exhaust components.
7. 7 Have the engine control module (ECM) tested and reprogrammed or replaced if all other causes have been ruled out.

Diagnóstico y costo