I have a 2002 sonata manual transmission. Over the past 4 years i have had multiple issues with it. Currently my o2 sensor is needing replaced for the second time and it is not starting. This issue is reoccuring and usually just takes a few tries to turn over. My battery and altenator are fine and have been replaced already. All my gauges, radio, and everything that should be on before starting work. It just wont turn over. Any idea what is going on or how to fix it?