Question about 1998 Mercury Sable

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I'm trying to locate the 02 sensor up and down stream on my 1998 mercury 3.0 dohc could i please have a picture or diagram.

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You will, in all probability have to get under the car to see it-you have one in front of the catalytic converter (each side) and one behind the cat (it doesn't really affect how the car runs, it only monitors the car efficency)-the O2 sensors are perpendicular to the exhaust pipe and have a 4-wire harness connected to it. they look like this:

Posted on Mar 17, 2011

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Mar 08, 2015 | Cars & Trucks

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Your exhaust has four 02 sensors. Code PO154 refers to no activity at bank two, sensor one.,Typically 02 sensors are good for up to 100K miles, after that their performance declines. You can try removing the sensor and shake it closely, next to your ear ( listen for a rattle). If you hear a noise while you are shaking it. The 02 sensor is junk. The side that Cylinder #1 is on is "Bank one" the other side is "Bank Two". Sensor one refers to the upstream senor (the sensor located before the CAT. Sensor Two would refer to the "Down Stream" sensor. Which refers to the 02 sensor located after the CAT. I hope that helps. Please write back if you have more details or questions. Good luck.

Mar 01, 2014 | Cadillac Catera Cars & Trucks

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Where is the 02 sensor located on an 1998 gmc vortec 6 cylinder?

On most of the GMC vehicles there is one located in the exhaust system before the catalytic converter and one after the catalytic converter.The one before the cat is your upstream sensor and the one after the cat is your down stream sensor.

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I need to know how many 02 sensors are on a 1997 dodge intrepid.

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I have 2008 toyoya tocoma truck only getting 13 mpg. the check engine light on, had it scope out said o2 sensor open, replced sensor had light cancel but came back on. still have problem

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Im confused my car is a toyota camry 6cyl not 4cyl and some say it has 4 o2 sensors and others say it has 2, hum, wich is it???? please help and also is there a site where it shows me like a diagram as to...

I have no diagram,but there is what they call upstream,and down stream locations.Upstream,is above the cat-converter,the down stream is below the cat-converter.This would be per-side.You have a left,and a right exhaust manifold.The exhaust pipes run from each manifold(left and right)to the catalytic converters.So you would have to have on the left side a up stream o2 sensor,above the catalytic converter.and a down stream o2 sensor,below the catalytic converter.this would also be on the right side also,this would be the total of four(4) o2 sensors.I hope this is helpful.

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