I need to figure out the timing marks on the crank and timing marks on the cam pulley. I also need to know which piston is the #1 cylinder. I just had the timing belt done and now I’m getting a P0340. When I look online it seems very uncommon to have that sensor go out, so I’m thinking it may be out of time. My friend who fixed my car said it’s doubtful but will check it. He said he needs to know the above information though in order to check it.