Rail pressure sensor 28509144 Delphi, OEM

Rail pressure sensor 28509144 is an OEM part for the engines with Delphi common rail fuel systems. According to the product card, this is the common rail pressure sensor; the card also lists Delphi 9307-512A.

A pressure sender monitors engine or transmission oil pressure and, when the pressure falls below a set value, triggers a warning on the panel or passes the pressure reading to a gauge. Low oil pressure can quickly wear bearings and gears, so the warning is taken seriously: if it comes on, stop the engine and check the oil level. A faulty sender can give a false warning at normal pressure or fail to show a real pressure drop. When the warning appears, first confirm the pressure with a test gauge; if it is normal, replace the sender. If the small hole in the sender tip becomes blocked, the sender reacts late or not at all, so clean the tip before fitting.

Specifications

Compatibility

According to the product card, 28509144 is a pressure sensor. Fit is confirmed by the part number. Other parts are in Sensors and valves.

Fitting

Moisture and corrosion inside the connector are a common cause of false signals from sensors and switches, so clean the connector and use contact spray if needed. Renew the connector seal if it is missing. The part is chosen by part number, and its connector type is compared with the old part.