02 sensor question
If you are installing a “universal” 02 sensor tht does not have a heater, it will not make your check engine light go away. 80% of the time an 02 sensor fails it is the heater, not the sensor. You may clear the code, but I promise it will return.
You can check the sensor with a multimeter by measuring resistance across the wires in and out of the sensor. The sensor does not have a ground wire. The sensor is grounded via the exhaust manifold. The 3 wires are: a constant 1 volt input, variable 0 to 1 volt output, and a constant 5 or 12 volts for the heater.