fix code p0491. also code p0410 p0411 p0412 p0413 refer to secondary air injection system.

Описание

I also put some links in the description for some of the parts I used to fix this vehicle.
there is one thing that I forgot to mention in my video if you have a vacuum controlled combination valve make sure you start by checking the vacuum line in between the combination valve and the engine if the vacuum isn't correct or the line is broken it will also throw these codes.