One of the most common causes of check engine codes in modern engines is a failed intake manifold gasket. In many modern engine designs the intake manifold is made of plastic rather than steel or aluminum. While the material is dimensionally stable under thermal loading, it doesn’t seal as well as the metal manifolds did. When (not if) that gasket fails, raw air leaks past the air meter and causes the engine to burn lean. This can damage your engine if left unfixed for too long. Make an appointment today and we’ll get you back on the road running properly!