2007 Malibu LS 2.2L Camshaft Sensor Location

I’ve just recently started driving my girlfriend’s Malibu with 268k miles on it and it sounds horrible. I ran a code scan and it came back with a POO16 so I picked up a new camshaft position sensor and tried to Google the exact location to install but I’ve found like 10 different answers that all contradict each other. She had the timing chain replaced previously but it still has trouble starting every other time or so, has no get up and go, and at idle sounds like it’s ticking and chugging. I refuse to pay a couple hundred dollars for something I should be able to do in 5 minutes. I just need a map.