258-0883: CAT Fuel Pressure Sensor (Low-Pressure Fuel / Fuel Transfer Pump Pressure Sensor)

II. Key Specifications

Measured Medium: Diesel (Fuel Transfer Pump Low-Pressure Circuit)

Measurement Range: 0–400 kPa (0–58 PSI) [Low-Pressure Fuel]

Electrical: 3-Pin Connector; 5V Supply Voltage; 0.5–4.5V Linear Analog Output

Mounting Thread: Specialized Sealing Thread; Resistant to Diesel Corrosion and Fuel Line Vibration

Protection Rating: IP67; Suitable for High-Temperature and Oil-Contaminated Engine Compartment Environments

III. Compatible Key Models / Engines

Primary Engines: C7.1, C6.6, C4.4, and select C9/C13 models (Aftertreatment Versions)

Equipment: 320D2 / 323D2 / 326D2 Excavators, Small Wheel Loaders, Generator Sets, and Auxiliary Construction Machinery

Installation Location: Fuel Filter Base / Fuel Transfer Pump Low-Pressure Line (Monitors for Insufficient Fuel Supply Pressure and Air Intrusion in the Fuel System)

V. Specific Fault Symptoms

Difficulty with cold starts; engine stalling when hot

Lack of power during acceleration; engine bogging down when climbing slopes

Frequent clogging of the fuel filter element; fuel system air intrusion alarms

No high-pressure rail faults reported; only low fuel supply pressure-related diagnostic codes are triggered