Toyota Repair: The check engine light comes..., toyota corolla ve, late model computer

Question
The check engine light comes on and off and the car sounds as if battery was almost dead. Does not happen every time car is started.Sometimes starts right up. Check engine light sometimes stays on other times not. Help! Car is Toyota Corolla VE 1999.

Answer
I need to know what diagnostic code is stored in the computer that makes the engine light come, you need to take it to a repair shop that can retreive the trouble
code(s), this is the first step of diagnosing problems with late model computer controlled engines.