o2 sensor test?
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New User
Joined: Aug 2001
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o2 sensor test?
I am wondering if anyone knows how test an o2 sensor on a 96 ford explorer v8. I am getting computer codes that say it is faulty but I have a slight problem. The truck actually has two. There is one mounted it the manifold on both sides and at $60 a piece I would hate replace them both.
Thanks.
btw, when did the auto industry starting using 2 sensors? Is that really neccessary?
Thanks.
btw, when did the auto industry starting using 2 sensors? Is that really neccessary?
Senior User
Joined: Apr 2000
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o2 sensor test?
Just think - now they can have at least 4 sensors! Try using a volt meter that can read the closest to 0-5 volts. An analog meter would be best, unless you have an expensive, fast reading dvom. Find the signal wire from the sensor, and backprobe it with the + lead of the meter and ground the - Lead of the meter. Watch the signal fluctuate. If one side goes up and down and the other doesn't, then replace the one that doesn't. By the way, if the second one is behind (after) the cat converter, it is just to monitor the efficiency of the cat, and it will usually not fluctuate too much after the cat warms up to operating temp.
88 F-150 4X4 XLT Lariat w/5.0 EFI 5 spd (DAILY DRIVER)
86 Ranger 2WD w/2.3L EFI 5 spd to be 351W 4bbl C4 (NEW TOY- DETAILS WHEN FINISHED)
85 Old Cutlass Supreme 350/TH350 Holley 4160,Edelbrock Performer intake, el-cheapo headers, General Kinetics 270H series cam, 15.588 best 1/4 mile with original 10 bolt 2.41 gears (OLD TOY)
88 F-150 4X4 XLT Lariat w/5.0 EFI 5 spd (DAILY DRIVER)
86 Ranger 2WD w/2.3L EFI 5 spd to be 351W 4bbl C4 (NEW TOY- DETAILS WHEN FINISHED)
85 Old Cutlass Supreme 350/TH350 Holley 4160,Edelbrock Performer intake, el-cheapo headers, General Kinetics 270H series cam, 15.588 best 1/4 mile with original 10 bolt 2.41 gears (OLD TOY)
Freshman User
Joined: Jul 2001
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o2 sensor test?
I don't know much about it, but Chilton's says never to hook up a voltmeter to an O2 sensor because it will harm the sensor. I'd love to know a way to test O2 sensors, but I'm not sure you can just hook a multi-meter to it.
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