03 v40 fault any ideas
 

Hi
Am new to forum so firstly hi to all
Could anyone offer any advice on th following please,i have a 03 v40 2ltr turbo which has developed a fault
The engine managment light came on a few weeks ago had it scannned and it came up with 6 errors
161,97,145,50,37,22
guy in garage reckons vvt solenoid is faulty as light has come on permanently he also mentioned it had a error code saying that it had had a missfire.car seems to run ok but lacks power would it be worthwhile replacing solenoid can i test it and how do i re-set faults ,any advice would be much appreciated
thanks
in advance