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Old 08-05-2018, 06:59 PM   #3
particlewave
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Join Date: Mar 2012
Location: Ft. Leonard Wood
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Quote:
Originally Posted by dghii View Post
Only your front O2 sensors are used for the CEL so as long as you leave them in place you shouldn't have a problem.

Best of luck!
Negative...

The rear post cat O2 sensors monitor the health of the cats. If the cats are gone, you'll get a code. If the sensors are gone, you'll get a code.
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