Hi today as I was driving my etc light came on and started to flash couldn't drive over 20 mph got the car home shut it off and than restarted and the light was out but now upon startup my idle stays at around 1500 rpm will occasionally shoot up to around 2000 than back to 1500 and the car running really rough almost like now it's misfiring. Any help on what possibly could be the issue and possible affordable repair cuz I can't afford a large garage bill. Thank you also I have a 2010 Dodge Avenger 2.4l with 53000 miles on it. Thank you