If they were coming on for some serious problem, smacking the side of the gauge cluster wouldn't make them go out. Happy Jeeping
The problem you are seeing is caused by the plugs as some of the others have said. It is not related to actual error codes generated by the computer. Buy it, use the link boogieman gave in post #12, and enjoy your TJ. Disregard all the other posts that keep talking about error codes, O2 sensors, TPS sensors, ...
Keep in mind that free advice can frequently be worth less than you pay for it.
Originally Posted by parraj4
Sent from my couch while drinking a nice cold beer
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