Can You Still Drive with the Common Rail Pressure Relief Valve Open?

[McHaley]

You cannot drive with the common rail pressure relief valve open. Below are the relevant details: Common Rail Pressure Relief Valve Failure: If the common rail pressure relief valve is faulty, the engine warning light will illuminate. The common rail pressure relief valve regulates fuel pressure. If it becomes clogged, the fuel injection pressure increases, potentially leading to higher fuel consumption. If the valve is damaged and remains open, it may result in insufficient fuel pressure, causing the vehicle to lack power and perform poorly. Introduction to the Pressure Relief Valve: The pressure relief valve, also known as an overflow valve or safety valve, opens when the fuel supply line pressure exceeds a set limit (e.g., typically 450Kpa), directly releasing the pressure into the fuel tank. Possible causes include blockages or bends in the fuel supply line, bends or blockages in the return line, or a clogged fuel filter.