I've had my car for two years and within the last 5 months my car has been stalling. I replaced the ignition coil twice since then. Only recently has the stalling become bad. I take my car to advance auto and the only error that comes up is ignition coil A and B. For my car there is only one ignition coil. I have taken my car to a few shops and none can find the problem. Can you please help by giving me ideas of possible problems to check for?