O2 sensors diagnosing. How?
Thread Starter
Racer
Joined: Sep 2008
Posts: 456
Likes: 0
From: FL
O2 sensors diagnosing. How?
Price of 4 wire O2 sensors is 23-100. All of them the same except different connector and wires color. I replaced connector for my new sensor for Jeep, so it was only $23, no big deal. I still don't want to spend $50 for 2 sensors for Corvette unless I am sure they are bad. Any advise how to diagnose them?
Safety Car
Joined: Dec 2008
Posts: 3,588
Likes: 10
From: North New Jersey
Well you can use a scanner and read off the numbers, but I dont know what those numbers mean.
Maybe someone can chime in and explain how to read the scanner for a defective O2 sensor...
Anyhow, if the O2 sensor is bad, you would be throwing a code... You have any codes?
Maybe someone can chime in and explain how to read the scanner for a defective O2 sensor...
Anyhow, if the O2 sensor is bad, you would be throwing a code... You have any codes?
Burning Brakes
Joined: Aug 2000
Posts: 1,146
Likes: 2
From: Albuquerque NM
Codes are the easiest way, followed by a scanner that give o2 readings (some are fault codes only), followed by a voltmeter.
Being the geek that am, I spliced a wire to the o2 output. Two of the four wire willbe at 12v for the heater, one ground , and the sensor wire.
The sensor wire should produce a varying voltage between 0.10v and 0.9v. The voltage isnt important; only that it is moving. An o2 sensor w/o a varying voltage is either bad or dirty...replace it. A zero voltage means a bad o2 sensor...replace it. 0.45-0.55v is the 14.7 range.
Being the geek that am, I spliced a wire to the o2 output. Two of the four wire willbe at 12v for the heater, one ground , and the sensor wire.
The sensor wire should produce a varying voltage between 0.10v and 0.9v. The voltage isnt important; only that it is moving. An o2 sensor w/o a varying voltage is either bad or dirty...replace it. A zero voltage means a bad o2 sensor...replace it. 0.45-0.55v is the 14.7 range.
