Cummins QSB 4.5L Temp Sensor 2018-2024: OEM 5572342

Engine Temperature Feedback for Cummins QSB 4.5L Engines (2018–2024)

What is it?
The Cummins QSB 4.5L Temp Sensor (2018–2024), identified by OEM part number 5572342, is an engine thermal sensor designed for Cummins QSB 4.5-liter diesel engines produced from 2018 through 2024. This sensor measures temperature in a targeted part of the engine or exhaust/aftertreatment system and relays that data to the engine control unit (ECU), which uses it to fine-tune combustion, aftertreatment responses, and emissions-related logic.

Why choose this Temp Sensor?
This temperature sensor is manufactured to Cummins’ original specifications for the QSB 4.5L platform, ensuring accurate temperature feedback and seamless integration with the engine’s control and emissions systems. When a temp sensor becomes worn, contaminated, or begins delivering inaccurate readings, the ECU may respond incorrectly—potentially affecting fuel timing, regeneration strategies, or emissions system behavior. Choosing the correct OEM-specified sensor supports reliable thermal feedback and coordinated system responses.

Key Benefits
✅ Engine-matched design for Cummins QSB 4.5L engines (2018–2024)
✅ Provides dependable temperature data to the ECU
✅ Helps support optimized combustion and emissions control
✅ Direct replacement — no modifications needed
✅ Built for high-temperature environments and heavy-duty use

Applications
This temp sensor is suitable for medium- and heavy-duty vehicles and equipment powered by Cummins QSB 4.5L engines manufactured between 2018 and 2024. Typical applications include commercial trucks, vocational machines, agricultural units, industrial generators, and other platforms where accurate temperature feedback is essential for efficient performance and emissions compliance.

Installation Notes
Before servicing, ensure the engine and exhaust components have cooled completely to avoid injury or damage. Locate the existing temperature sensor, disconnect its electrical connector, and remove it from its mounting point. Inspect the sensor port and wiring harness for corrosion, soot buildup, or wear before installing the replacement. Thread in the new sensor and torque to the manufacturer’s specification, then reconnect the electrical harness. After installation, clear any stored system codes and verify correct temperature readings using diagnostic tools.

Final Thoughts
If your Cummins QSB 4.5L-equipped vehicle is showing temperature-related fault codes, uneven combustion behavior, or inconsistent emissions feedback, replacing a worn temperature sensor with the correct OEM-specified unit can help restore accurate thermal monitoring and smoother engine and emissions system operation. The Cummins QSB 4.5L Temp Sensor (OEM 5572342) plays a vital role in maintaining dependable temperature feedback and coordinated performance across varied duty cycles.