Bobcat S740 P21DD Error Code
P21DD Error Code
DEF Supply Module Heater Short to Ground is the main cause of P21DD error.This code can lead to engine failure if the issue is not addressed. Working with a maintenance professional is crucial in order to review and address signs of overheating on your vehicle. In the long term, this can prevent failure at a critical time.
Tip For S740 Model
It is recommended in cold weather to cycle the glow plugs twice before attempting to start the engine. This will allow for additional heating time for cold weather starting.