10-02-2008, 10:25 PM
Modern cars are very sensitive to both low voltage and bad grounds.
I would start by pulling the battery cables, clean the cables and posts and charge the battery. If the battery was discharged enough that you needed a jump then it needs to be properly recharged. Depending on the current actual state of charge this can take up to 24hrs for the battery to reach 100%
Removing the battery for an extended time to charge should also allow the ECU to reset itself.
Your check engine light is most likely out because of the battery going flat causing the computer to reset (or at least partially). It's possible that the computer is operating in "limp home" mode (due to the low battery and then the sudden spike of the jumpstart) which enables the car to run but just well enough for you to get it home...
I would start by pulling the battery cables, clean the cables and posts and charge the battery. If the battery was discharged enough that you needed a jump then it needs to be properly recharged. Depending on the current actual state of charge this can take up to 24hrs for the battery to reach 100%
Removing the battery for an extended time to charge should also allow the ECU to reset itself.
Your check engine light is most likely out because of the battery going flat causing the computer to reset (or at least partially). It's possible that the computer is operating in "limp home" mode (due to the low battery and then the sudden spike of the jumpstart) which enables the car to run but just well enough for you to get it home...