I probably should have started on 'technical/troubleshooting' but started with 'engines/exhaust':
On this category since it's 'engines' and 'exhaust' which relate to the topic... After watching the 'check engine' light go on and off periodically for a few months, I finally went to Auto Zone to have the p-codes checked, the guy didn't know where to plug it in, usually under the dash he says. So where does it hide? Thanks!