Diesel pressure sensors monitor critical readings - fuel rail pressure, engine oil pressure, and boost/MAP - and feed them to the ECM; a drifting or failed sensor causes derates, hard starts, and pressure codes. We stock OEM-brand pressure sensors for platforms including Ford Powerstroke, Dodge Ram Cummins, and GM Duramax, from manufacturers such as Bosch. Most ship fast within the US, many with no core charge. Match the sensor to your engine's OEM part number before ordering.