I was changing my oil this holiday weekend and could not help but notice a paticular engine sensor making a loud clicking sound. The sensor is located up near the brake vaccuum and air filter in the upper right hand side. The sensor is marked with the suppliers name "Denso" on it being held on a bracket. It appears to be monitoring air flow going to the air filter. The clicking sound is pretty noticeable and you can feel the unit clicking when you hold it. The sound is the most noticeable coming from the engine and does not seem correct. Has anyone else notice this? Is something wrong with this?