Oxygen Sensor failed after brought it to Canada - cold weather - JeepForum.com

 
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post #1 of 3 Old 11-29-2012, 09:27 PM Thread Starter
Peter2002
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Oxygen Sensor failed after brought it to Canada - cold weather

I bought my Grand Cherokee Limited with a V8 engine in California back in 2000. I brought it to Canada three years ago. The CEL went on and it indicated oxygen sensors failed, both upstream and downstream. I did not do anything for two years. Recently, I replaced all four, but then the CEL came on again after 4 days, reset the light, it came on again after 48 hours and it indicated all 4 failed again. I wondered if the cold weather here in Canada requires a different set points in the computer and the oxygen sensors were not really failed in the first place.

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post #2 of 3 Old 11-30-2012, 04:33 AM
tjwalker
It's the crank sensor!
 
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These forums are "model specific". This forum is for regular Cherokees (XJ)

You have a Grand Cherokee. Find the year of your Grand Cherokee here and best to make posts in that forum. Good luck!

http://www.jeepforum.com/forum/f2/

99 Cherokee, 4.0 AW4, NP242
Past Jeeps: 49 Willys, 81 Scrambler, 88 Comanche
Without "data", all you have is an opinion!
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post #3 of 3 Old 11-30-2012, 06:09 PM
blamo
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Not likely, I mean, how the heck cold is it getting there? Here in Massachusetts it gets below zero often and it has no effect on O2 sensors.
The sensors have ceramic heaters in them, the are made to bring the sensor up to operating temps quickly. The other metals are not affected by normal temps.
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emission , engine computer , oxygen sensor

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