Quote:
Originally Posted by jcosta79
In Texas they plug into your OBD-II port and look for check engine lights and fault codes; they don't do a sniffer test. If you don't turn off the rear 02 sensors (which as far as I know can only be done via a tune), you will eventually get a CEL when running test pipes.
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You are correct but if you're not tripping a code at the time you'll have no code. I go months and months without tripping a code.