Before my max only hard started when it was warmed up(warm start issue) now whenever I turn it on it a hard start, maf maybe or could it be the P0420 code I have? What steps should i take to figure out what is the cause of these hard starts?

 

Alternator. Probably on it's way out like mine was last year. That then battery.

 

Does it start Okay when Cold, but have trouble starting when warm? How do you get your car to start?