Medium and Heavy Trucks
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Hi my name is***** will be glad to try to help. What is the engine model number in your truck?
P141F is for the DPF system. Remove the injector and inspect it. Most likely the tip will be damaged and overfueling which is common. Replace the injector
The other fault 204 indicates a fault in the SCR system.... Repair the other and then regen and see if the other fault goes away. Let me know