ga294eny

i recently purchased a s500, for cheap. and the car will not go over 45mph, and when i reach that speed, its starts to stall , sputter, hesitates as if i am on governed speed. lol. i took it to nearest autozone, and they scanned it ) i know its not STAR tool) but the coeds where MAF sensor and Speed sensor. yes the check engine light is on, the esp and bas... but why want my car go over 45mph? also i did take it by a shop, and they told me all kinds of crazy stuff like, the car has rims on it so that could be the reason... wow.. my brother has the same car and it has 22's staggered on it, no issue. i have a rl with rims on it and no issues. Im just sayin.