I have a check engine light popping up P200A for VCM Actuator/intake manifold runner. I recent took my car to the dealer for inspection, they confirmed that it is the vcm that is bad. They informed me they do not cover anything under warranty unless purchased car was purchased there. My question is, is it hard to change yourself? Does the computer need updated afterwards, or would it be in my best interest to find a mechanic to fix the issue?