ksems

I pulled the oxygen sensor out over the weekend to take a look.
I had received the code 55 about a week ago.
The oxygen sensor looked okay - I think.
It was grayish in color with just a hint of white in a couple spots.
No black residue -carbon, etc.
Am I correct in thinking that all is well here -

Thanks
Kevin


[Modified by ksems, 10:08 AM 1/2/2002]

Armstrong

Make sure the ECM ground connectors are tight. If they are,either the ECM or the O2 sensor is bad. Looks can be deceiving. I took this directly out of the Haynes Manual. Anybody else have any input on the subject?

ksems

Im hoping its not computer....:(

71coupe

I don't know codes or what year you have, but you can read the sensor output if you have a good digital multimeter (Fluke). You will need to tap into the harness & add a pigtail. The sensor generates it's own electricity.
There are several things that will cause a trouble code to come up. If you installed a lower temp thermostat or if the motor is too rich. A bad thermostat may trigger a fault code as well.
If you have a A.I.R. (smog) pump, make sure it's working & the diverter valve downstream is working right(It's the little valve just before the lines branch into the exhaust manifold. One way to see if the diverter is bad is to look at the hose that comes out of the smog pump into the diverter. If it looks burned or severly dried, the valve is bad (exhaust is flowing into it)
There are a few other things to check: Make sure the door in the thermostatic air cleaner is opening when the motor is warm. Also check your EGR valve & make sure it's not stuck open.

ksems

71 -

interestingly enough - I did put a lower temp thermostat in about a month or so ago.
I put a 185 in the car - the stock I think is 195. I thought this was okay to do.--maybe not.
Ill try putting a 195 back in...

Thanks
Kevin