ds475

i have an 82 928S, and the OXS light was on. so, i took the o2 sensor out of my crashed 85.0 944, and was going to put that in. well, i look at the existing o2 sensor and realize that the insulation around the wire was worn and i thought maybe the o2 sensor was shorting out. so i taped up the worn part on the wire and re-installed the old o2 sensor, and OXS light was still on (after starting and running), so i put in the 944 o2 sensor and after starting up again, the light was still on.

i'm guessing both sensors are bad? does the OXS light go off when a working sensor is installed?

all help is appreciated, thanks!

jorj7

ds475,

I don't know if your 82S is like my old 81, but there was an O2 sensor
counter next to the passenger seat by the door that needed to be
reset.



photo from
http://sis125.berkeley.edu/928/oxysensor.html

Garth S

ds475,
Just to add to jorj7's note, the counter is more or less like an 'hour meter' on a diesel - it tells you nothing about the condition of the O2 sensor, it's a recommended change interval indicator. Your sensor may still be good (or have been toast 10K miles ago). A digital multi meter will indicate if the output voltage of the sensor is functional: nominal 0.1v - 0.9v, .4 -.6 avg.

Jadz928

You guys are great! So now he's shaved 8 ounces from the passenger side, and added it to his glove box (in the form of a multimeter).
Sounds like a good trade...

Garth S

Actually, we're covertly redistributing mass towards the center of gravity so as the lower the polar moment of inertia!!
Thanks for the idea - I would never have thought of leaving the multi - meter in the glove box.

heinrich

Isn't that funny -- a hidden, mammoth clunky switch .. hidden under an interior body panel ... and its function? .... to reset manually, a timer that has zero bearing on the condition of the device (O2 sens) for which it warns ... Dang

ds475

dammit, i don't have a multimeter... but i think i'll just go buy a cheap o2 sensor from autozone, every single wire o2 sensor is created equal, right?