I started this morning and drove for couple miles and the RPM still at around 100-200. Still really low. I have let the car run for 5min just to make sure if it dies and car didnt die but it sounds little different then before when those Light didnt came on.I have to go to work tom, is it ok to drive. I have to drive on Highway and I just want to make sure the car doesnt die on Hwy. I am thinking about heading to Autozone to get the code after work tomorrow. How much auto zone charge to diagnose?