I have check engine light on ,repair shop says it's code P0016, P0017

Hi Dave , thanx for Your response , we had this car for over 3 years and check engine light appeared first about 2 months ago . Nothing was done to the engine, as I know of , in the time we owned it . In Your opinion can it be stretched timing chain ? Should I start with camshaft position actuator solenoid valve ( if that is the easier task ) ? Thanx again Ziggy

Sure, you could have a chain issue, but this is why testing is essential. Following test procedures, you can find out of there is a wiring problem, a valve problem, an engine timing problem -- but cutting the corner and starting by replacing a part is such a bad idea. You can actually make matters worse and more difficult to troubleshoot. Example: Suppose you have a wiring problem. You replace the part. By doing so, you disturb the wiring temporarily when replacing the part, and everything seems to work well as a result. 3 days later, your failure happens again. Do you assume the new part is defective perhaps, and go to replace it again, instead of working to troubleshoot and find the wiring problem? It can get to be a mess. Start with proper troubleshooting. Employing the use of a trusted shop and technician near you is not money wasted. It can save you hundreds in the long run. Good luck.