I have 2007 Mercedes s550, It runs without any issues but I can see P2004 error code which says: Intake Manifold Runner control stuck open Bank 1a. A week ago I saw a check engine light on, I plugged in ODB2 device and was able to read P2004 and P0025 (B Camshaft Position - Timing Over - Retarded Bank 2). I removed errors and Don't see check engine anymore as well as P0025. Only P2004 stays. I did some research and I see that usually p2004 pops up when Intake Manifold Air Flap Runner is broken. I checked mine and it looks fine but it's not moving when I turn on the engine. Not sure when it should move though. Any ideas how can I troubleshoot my problem?
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