computer reading- Invalid Catalyst
01-23-2004, 08:38 AM
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computer reading- Invalid Catalyst
my check engine light came on so i did the whole paper clip in the connector trick and the light read a code 67. which ended up meaning-Catalyst system Efficiency Below Threshold malfunctioning or defective catalyst system.
I just got the whole exhuast system done with a hi-flow cat installed also. The thing is tho, the muffler shop that did it said that shouldnt have set it off. The dealership said the same thing. The only thing i can think it might be is the O2 sensor went bad. i no theres a code for that but is that even possible? and if it is because i got the cat put on, what do i do to make the check engine light go off. cuz reseting the computer gets old real quick...
I just got the whole exhuast system done with a hi-flow cat installed also. The thing is tho, the muffler shop that did it said that shouldnt have set it off. The dealership said the same thing. The only thing i can think it might be is the O2 sensor went bad. i no theres a code for that but is that even possible? and if it is because i got the cat put on, what do i do to make the check engine light go off. cuz reseting the computer gets old real quick...
01-23-2004, 10:00 AM
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Re: computer reading- Invalid Catalyst (LS stretch)
The Hi-Flow cat is your problem... I also did a free-flow cat on my 99 LS and it threw the same exact code... I never found a fix except to convert it to OBD1 or just put the stock cat back on...
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