I just bought my daughter an 02 Grand Cherokee. When I bought it I was told it needed a new alternator and it did. Replaced the alternator the next day. It started and ran great. I drove it a couple of times then it started having a hard time starting and the check engine light came on. I hooked up the code reader and it said the throttle position sensor was the problem. I changed it out and it was a little hesitant to crank but it did. It didn't want to idle at first but eventually held idle. Check engine light came on and it started idling rough again. New code, P0108, MAP sensor, Barometric Pressure Circuit High. What is going on? This thing has just under 93K miles and after an alternator change I'm getting code after code. Any ideas?

 

Disregard. I started looking again and the connector wasn't connected securely. All is well now.