Anyone know anything about this issue? I bought this car about a year ago, and from my knowledge since I purchased it the odo has been rolling at least 3-4x faster than it should. I bought the car at around 200k miles, and it shows nearly 230k! Any advice would be appreciated!

 

Does your check engine light turn on while driving, or do you have a flashing D4 light? Can you set your cruise control while driving and have it work properly?

You may also want to check for engine and transmission codes as a first pass. See the link for reading the CEL in the common DIY thread on top of the gen tech help forum for a writeup.