What's the BMW fault code 29dd?

The BMW fault code 29DD typically indicates that there are issues with either the solenoid valves, the vacuum lines, or both systems entirely. This valve, along with the vacuum lines, are responsible for managing and regulating the flow of liquids into the engine. Specifically, they are used to open and close the valves that allow for gas and liquids to pass into the engine. If the 29DD error code appears, its best to simply replace the faulty part. While this can be done at home, as the parts are fairly cheap, its best left in the hands of an experienced mechanic. If this error code pops up, its best to take the car to the dealership or at the very least, an auto shop.