95 Avenger ES Oxygen sensor location
 

Got an easy one I hope. My haynes is wrong on the location of my o2 sensors. I have a 1995 ES and am getting error code 21. Just says (paraphrased - "Problem with Oxygen sensor signal circuit. Sensor voltage to computer not fluctuating"). I figure that means I should replace. I have heard the 95 Avengers do not have 4 or 3 but only 2 sensors. Can someone tell me if replacing is the correct answer and if so, where are they located and should I do both?

Thanks

I thought the ES signified the 2.5 V6 but since I have read some other posts that touch on the topic figured I should calrify that it has the 2.5 V6.

Examne the wires first it could be broken/disconnected causing it to not fluctuate

Gotta find it first

Jollow the exhaust/Downpipes they are welded in a bung along there

'Fraid you was gonna say that. I am a big dude and getting in can be a challenge let alone under. Guess I just need to suck it up and get out the floor jack.

How many do I have. I figure one before the converter and one after??

my manuals an 98 not sure on yours

Mine isn't specific enough. Its a Haynes for 95 - 2000 avengers and sebrings. The info for the 2.5 appears to detail just the newer years. I am going to put the jack under it in the morning even if just to locate them. Gonna be a scorcher here tomorrow and we only have available shade early.

Just want to say thanks to all the moderators and other enthusiasts for the wealth of information. Especially upon answering and advising on subjects that get posted repeatedly. Kudos to all of you and thanks. The help is priceless.