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In most cases, the BMW fault code 29DD indicates issues with either the solenoid valves, the vacuum lines, or both systems entirely. These components control the flow of liquids into the engine by opening and closing valves that permit gas and liquids to enter. To address the error code, it is recommended to replace the faulty part. Although this can potentially be done at home due to the affordability of the parts, it is advisable to seek assistance from a skilled mechanic. If the 29DD error code appears, it is best to take the vehicle to a dealership or, at the very least, an auto repair shop.
In a BMW, if you see Code 29DD, it indicates an issue with the temperature of the charge air.
Vehicle functions when the engine is cold but fails to start when it is hot
The car has this code, but it runs well in both cold and warm weather.