Replaces OEM Part Number:
234-4851
Fit for:
Must Know Before Buying:
A: The only way to know if the O2 sensor is functioning normally is to check its responsiveness
to changes in the air/fuel mixture, by Voltage Measurement or Waveform Simulation.
Use a 10-megaohm digital voltmeter. Hook up the voltmeters red probe to the sensors signal wire
and the black probe to engine ground. (Use back probe method, DO NOT pierce the wire.) For a
good sensor, voltage should fluctuate constantly between 0.1 and 0.9 volts after starting the
engine for 2 or 3 minutes.
Please take a video clip of the voltmeter and contact us if our sensor:
Goes above range between 0.1 and 0.9 volt
Remains below 0.5 volts
Stays fixed at a particular voltage
Youre free to choose replacement or refund if our sensor fails to work, in this case.
