I just bought a 2013 dart, 2.0l 6speed. It's CEL is on and it goes into limo mode and won't rev over 4k after like 45 seconds. I've tried reading the codes but my scanners (I tried a few) won't connect and read the ECU. I'm a bit panicked because I don't have money to take the car to a dealer for repairs and I'm not sure what to do from here because I can't pull any codes.... HELP!!