85 oxygen sensor help
Melting Slicks
Joined: Jul 2005
Posts: 2,218
Likes: 302
It's not going to put out enough voltage and current to light up a test light.
If you dont have a scanner...
You'd be better off hooking up a voltmeter (if its fast enough to keep up with the fluctuations since the sensor is continuously bouncing between about .1 and .9V)
If you dont have a scanner...
You'd be better off hooking up a voltmeter (if its fast enough to keep up with the fluctuations since the sensor is continuously bouncing between about .1 and .9V)
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Melting Slicks
Joined: Jul 2005
Posts: 2,218
Likes: 302
Put the meter on the O2 sensor wire while the engine is running and at full operating temp. If the voltage isn't bouncing between 100 and 900 mV, likely a bad sensor.
The sensor doesn't depend on the ECM to run itself. It generates its own voltage output that the ECM reads.
The sensor doesn't depend on the ECM to run itself. It generates its own voltage output that the ECM reads.
Last edited by ULTM8Z; Feb 18, 2024 at 02:03 PM.