Toyota Repair: 95 toyota camry, valve cover gasket, toyota camry

Question
I HAVE A OIL LEAK AND HAVE HAD THE VALVE COVER GASKET AND O RING REPLACED AND THE MAIN SEAL RELACED DO YOU KNOW WHAT THE PROBLEM COULD BE MY CHECK ENGINE LIGHT IS ON AND WHEN I UNHOOKED THE BATTERY IT WENT OFF FOR A WHILE AND NOW IT IS BACK ON  

Answer
You should have the diagnostic scantool connected to read what trouble codes are in the computer, knowing the codes is the first step in diagnosing why the check light is on, you can have this done at the toyota dealer or an independent shop, they will charge a diagnostic fee, if you can locate an autozone parts store they will usually do this at no charge.