[soundman98]

do you have more details on how the cam chain wasn't installed properly?

my first suspicion anytime a code pops up in a case like this is the sensor. it sounds like you tried checking this by swapping the sensors on each side.

i'm not fully convinced that a sensor wasn't damaged, but i'd also be wary of assuming that the timing chain is fully installed correctly if you're getting odd valvetrain noises. iirc, the tensioners aren't always re-usable, so if they're re-using it from the 'incorrect procedure' method, it's possible they damaged the tensioner removing and reinstalling it.