OXS Light On...

[springerman55]

I have an '83 SC and while driving last ngiht the OXS light came on. Car runs fine, doesn't seem to be to rich or too lean. Before I start checking all of the components and voltages associated with the O2 sensor circuit, should I just replace the O2 sensor and be done with it? The cat was replaced years ago with a test tube and the CIS was re-adjusted at the time. The O2 sensor has been in there for quite some time.

[psalt]

Hello,

The OXS is a timer for 30,000 miles, many sensors live much longer than this. You need to pull the speedo and press the white button to reset the timer. If you want to know the health of the O2 sensor, you need to hook up a dwell meter to the test port and watch the frequency of the duty cycle.

[MURF]

light is mileage controlled by a black box in you speedo circuit its located behind your gauges..there is a push in reset button on box to cancel the oxy lite

[scottrx7tt]

my o2 sensor is unplugged.

[springerman55]

Thanks for the good info. Feeling kind of dumb as I didn't realize it was a simple reset. Too used to ODBII vehicles.

[pranderson]

Ok guys, Am I the only one up at O'dark thirty working on my car? My OXS light came on on my 83SC at 76K. The car ran fine. First thing I did was a search. And thought "Holly Cow! It can't be that easy!!! I changed the O2 sensor (which is probably fine, but I'm anal about stupid things like that?) then I pulled the speedo, then the tach and then the oil gauges, and I can't for the life of me find that reset button!! Can anyone out there help me out? Is there an alternate location for the reset button? Or is it just hidden down in there somewhere out of site and unskilled "virgin" hands?

PS. I've got a O2 sensor that Im sure is fine (Can't guarantee it, I didn't check it with a dwell, but for the price????). If anyone needs a slightly used one, Ill be happy to send it to you. Just PM me your name and address and I'll send it to you. I just can't bring myself to throw stuff like that away.

[aadrew10]

Take a look behind the speedometer. Not on the back of the speedo, but inside the hole the speedo used to be in. A small white button exists somewhere back inside the dashboard and may read OXS or SXO somewhere near it. (depending on its orientation) On my 81 it is about 6-8 inches behind the circle cutout of the dash(towards the front bumper), and say about 3 inches lower than the bottom of the circle(towards the ground), and maybe an inch or two to the right of center.

If you can't find it, it must not be there or you must be blind.

good luck!

- Andrew

[grahamkissack]

PR...I'll take that O2 sensor off of your hands since I know mine is dead. Pm'd you a message. Thanks!

[pranderson]

Found the reset and a new owner for the sensor. Thanks for the help. Ill try to post a picture as well. So turns out the reset is straight down behind the speedo on the back speedo box lower right corner by feel only for me?

[don gilbert]

if its never been changed, i would get a new one. If you watch an older one and a newer one on dwell, the new one always works way faster. You can get a bosche one wire at oreilly's for under 20 dollars.