lexuscrazy

Hi all. I decided to finally tackle my O2 sensor issue and have a couple of questions.
1) I tested the heater resistance of the main sensors (front) with a ohmmeter and the resistance was about 1.3 ohms on both sensors. Is that normal? The car had cooled down for about 2 hours so i'm not sure what the temp was. But is that reading ok?

2) I tested the resistance on the sub sensors(rear) and got no reading on both! Does that mean they're pooped or am i testing them wrong? There was only 2 wires on the sub sensors so i dont think i could've gone wrong??

Any help would be appreciated!

Thanks.
Al.

Suneet

According to LexLS's site, the resistance should be near 5ohms..

http://www.lexls.com/tutorials/EFI/m...gensensor.html

Looks like they need to be replaced. Are you sure you're measuring it the way stated in that tutorial?

lexuscrazy

Thanks for your quick reply! Yes i think i measured right and exactly as "lexls" states. The thing is is that i got the same reading off the new sensors i purchaced(bosch universals). Any more input would be appreciated.

Thanks.
Al.

Suneet

Hmm.. what does the box say on the Bosch universals that they should read? Are you sure your multimeter is working correctly? Make sure that you've stripped eonugh of the cables to get a good reading?

Suneet

I would try calling Bosch. Perhaps the resistance values are different for your 91..

lexuscrazy

Well imna put it off for now although i really wanted to change them before we went on our trip(alot of driving) but what can you do? I'll keep y'all updated either way. In the mean time i'm still open to suggestions!
Thanks Suneet!

Al.