Hi,
if you feel confident in using a digital auto test meter. Disconnect the sensor, and check the value range with the test meter to ensure it is within the set parameters.
However, before embarking on that task. Some ECU's will display a fault code, but will require re-setting to clear the code. With a new sensor fitted the ECU should re-set, although some "hold" the code in memory, it does not come up as a visible fault. Some vehicles can be driven a few miles, then the ECU will learn that the new sensor is within specs and will react accordingly.
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