Cummins ISB, ISL Pressure Sensing Tube 2017-2024: OEM 5505839

Accurate Pressure Routing for Cummins ISB & ISL Engines (2017–2024)

What is it?
The Cummins ISB/ISL Pressure Sensing Tube (2017–2024), identified by OEM part number 5505839, is a dedicated pressure line used in Cummins ISB and ISL diesel engines built between 2017 and 2024. This tube provides a pathway for pressure signals from the intake or exhaust system to reach onboard sensors, enabling the engine control unit (ECU) to monitor combustion and aftertreatment conditions accurately.

Why choose this Pressure Sensing Tube?
This sensing tube is made to Cummins’ original standards for the ISB and ISL platforms, ensuring precise fitment and dependable routing of pressure signals. When a pressure sensing tube is cracked, pinched, clogged, or otherwise compromised, the ECU may receive incorrect pressure data. Incorrect readings can lead to irregular combustion timing, unexpected emissions behavior, or pressure-related fault codes. Installing the correct OEM-specified tube helps maintain reliable pressure feedback and supports coordinated engine and emissions system responses.

Key Benefits
✅ Engineered for Cummins ISB & ISL engines (2017–2024)
✅ Provides accurate pressure data to onboard sensors
✅ Supports coordinated combustion and emissions control adjustments
✅ Direct replacement — no modifications required
✅ Built for rugged intake and exhaust environments

Applications
This pressure sensing tube is suitable for medium- and heavy-duty commercial vehicles and equipment equipped with Cummins ISB or ISL diesel engines manufactured between 2017 and 2024. Typical applications include delivery trucks, vocational fleets, regional hauling rigs, construction machinery, and industrial equipment where accurate pressure monitoring is essential for optimal performance and emissions control.

Installation Notes
Before servicing, make sure the engine and intake/exhaust components are fully cooled to avoid injury. Inspect the existing pressure sensing tube for cracks, blockages, or deterioration prior to removal. Install the replacement tube, making sure it is routed correctly and secured at all connection points. Once installed, clear any stored fault codes and verify correct pressure readings using diagnostic tools.

Final Thoughts
If your Cummins-equipped vehicle is showing pressure-related warnings, irregular combustion behavior, or unexpected emissions system responses, replacing a worn or damaged pressure sensing tube with the correct OEM unit can help restore accurate pressure feedback and smoother overall system operation. The Cummins ISB/ISL Pressure Sensing Tube (OEM 5505839) is a key part of dependable pressure monitoring and coordinated engine management.