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Old 11-08-2006, 04:21 PM   #6
subliminal_misery
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Join Date: Oct 2006
Posts: 5
Default Re: check engine light stay on
Quote:
Originally Posted by 1989GT
If the rear O2's aren't there and they haven't been turned off by a tuner/chip of some sort then yeah that'll cause a check engine light. Take the car down to auto zone and have them scan the codes (it's free) then post 'em up.


I took my 98 gt and had a scan ran for codes . the code that was found is P0420 CATALYST EFFICIENCY BELOW THRESHOLD ( BANK 1). DOES ANYONE KNOW WHAT THE PROBLEM COULD BE????
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