P0012 Code and not starting

Hello, Dave here, contributing to RepairPal and providing expert advice since 2010. Replacing parts is not the best first choice - testing is best. What testing has been done to observe and monitor valve timing? Note that something as random as radio interference can cause an issue to set this code. I would not advise "looking through the motor" - I do not see value here. I would recommend a second opinion from another shop - reach out to a different shop near you. https://repairpal.com/auto-repair-near-me Click the link or call us at 877-913-1554. We'll gladly find you a certified RepairPal shop in your area.