Fault codes corsa 1.2

[Jw198406]

I have a couple of fault codes thrown up on a 1.2 2014 corsa - p0016 and p0017 corresponds to crank and cam sensors, engine lacks power and is lumpy so I'm guessing could be timing issues I brought q new crank sensor to eliminate that but not fitted yet can't get car in garage until next Friday so just looking to see if anyone else has had same