Originally Posted by lifeofchaos13
Im a full Noob to this truck. Only had it 2-3 months and have no idea what the previous owner did to it. Is there a way I can check for codes or where he may have changed the programing? OR do I have to take it somewhere to have that checked?
Well, if you're going to keep the truck and get into working on it yourself, you can get a pretty good OBD-II reader for under $100. Its a good long-term investment- check on Amazon for some good deals, or at your auto parts store. I'm pretty happy with this one
, at least in terms of bang-for-buck. It may not hold up for years, but its served me OK so far.
If you're not ready to drop cash for your own reader, a lot of auto parts stores will do a code scan for you. I think Autozone usually does.
Be aware that most OBD-II readers are limited in the specific transmission codes they can read... but they will tell you about a lot of sensors related to transmission function like TPS, input/output speed sensors, etc.