Ever since the last oil change at Jiffy Lube...let me start....my car for it's first time ever started popping on and off the oil sensor light. Logically I check oil...it's full. I thought ok...oil pump? She still purrs... She then starts and an engine light a few weeks later so I have the code pulled...timing! Now she just won't start. Is this too expensive to bother with...could it be something simple...idk. i do know after this last oil change she chocked to death. Any advice?