CATEngine Parts

344-7391 Common Rail Pressure Sensor — Cat 420F 428F

This is a common rail pressure sensor, an electronic component that monitors and reports the fuel pressure within the common rail fuel system to the engine control module (ECM). It is manufactured to meet OEM standards for accurate pressure readings, which is crucial for precise fuel injection timing and quantity, unlike a faulty sensor that provides inaccurate data. Symptoms of a failing pressure sensor include the 'Check Engine' light illuminating, rough engine operation, loss of engine power, and potential stalling.

Common Rail Pressure Sensor – Part No 344-7391 – CAT Spare Part
Part Specifications
BrandCAT
CategoryEngine Parts
ConditionAftermarket — OEM Specification
DispatchSame-day from Mumbai (before 3 PM IST)
GST InvoiceAvailable — all orders
Export DocsCommercial invoice, packing list, COO

Compatible Models

Always verify with serial number before ordering.

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Installation & Application Notes

Inspect mating surfaces for wear before fitting. Use torque specs from service manual. Replace gaskets and seals as a set — reusing compressed gaskets causes oil leaks. Clean all oil passages with compressed air.

Always consult the OEM service manual for model-specific torque values and procedures. WhatsApp our technical team if you need fitment guidance.

Part TypeCommon Rail Pressure Sensor
MaterialPlastic, metal alloy
ApplicationCommon rail fuel system
Service LifeReplace as needed based on diagnostic codes
CompatibilityOEM specification
ConditionNew — OEM specification aftermarket

Failure Symptoms

The illumination of the 'Check Engine' or 'Malfunction Indicator Lamp' (MIL) is often the first indication of a faulty common rail pressure sensor. This can be followed by a noticeable loss of engine power, rough idling, and potentially engine stalling if the ECM cannot accurately regulate fuel pressure. Continued operation with inaccurate pressure readings can lead to inefficient fuel combustion and potential damage to the fuel system components.

Installation Tip

Ensure the electrical connector is clean and securely attached to the new sensor to guarantee proper signal transmission. Do not apply excessive force when threading the sensor into the common rail, as this can damage the threads.

Service Note

Inspect the fuel rail, fuel injectors, and fuel pump for any signs of leaks or damage when replacing the common rail pressure sensor.