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-   -   error code 21 (http://www.wranglerforum.com/f218/error-code-21-a-77319.html)

60mg 01-24-2011 09:42 PM

error code 21
 
Oxygen sensor related. what are the chances it is connections issue :) it pops after some time of driving, lately rather quicker than normal and highway quicker than on the streets. It starts up fine, works for a while and then comes on. Disappears after restart till next time and it keeps on going like that. No idling issues, accelerates fine, I guess other than the light nothing is out of the ordinary . Any thoughts?

Garyk 01-24-2011 09:54 PM

How many miles on it, they're only good for so many, 80K i think

60mg 01-24-2011 09:56 PM

That sort of explains it :D - 170K

orfedj 11-07-2012 03:35 PM

sounds familiar
 
I'm experiencing the same exact thing in my 95 wrangler...

Very intermittent trouble code 21... Last time I reset the codes, it roll 163 miles for the good to return...

Did replacing the O2 sensor resolve your issue?

I've heard code 21 can be falsely caused by a number of things...

Before I buy a new sensor, I'd like to pinpoint the problem...

Thanks


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