Wear or internal failure of the high-pressure pump .
. This occurs when the actual fuel pressure deviates from the engine control unit's (ECU) commanded level for a sustained period (typically over 2.5 seconds) while the engine is under load. СБ Про-Сервіс Symptoms and Effects New Holland 3297 Error Code
Examine injectors for internal sticking or excessive wear that could lead to pressure loss . Wear or internal failure of the high-pressure pump