Paccar / Cummins DEF Sensor : OEM ASP61DS21-FG

Trusted Emissions Monitoring for Paccar and Cummins Systems

What Is It?

The Paccar / Cummins DEF Sensor (OEM ASP61DS21-FG) is a specialized emissions system component that tracks Diesel Exhaust Fluid (DEF) level, temperature, and quality within SCR-equipped diesel vehicles. It provides accurate data to the engine control module, allowing the system to function efficiently and meet emissions standards.

Why Choose OEM ASP61DS21-FG?

The OEM ASP61DS21-FG is designed to meet original specifications for both Paccar and Cummins applications. It offers precise readings, dependable communication with vehicle electronics, and a hassle-free fit—helping to prevent false alerts and unplanned service issues related to DEF system faults.

Key Benefits

✅ Multi-Parameter Monitoring: Tracks DEF level, temperature, and quality
✅ OEM Precision: Calibrated to meet exact tolerances for Paccar and Cummins systems
✅ Reliable Construction: Built to withstand DEF exposure and environmental stress
✅ Plug-and-Install Fit: No modifications needed—connects directly to factory wiring
✅ Supports Compliance: Helps maintain SCR operation and avoid warning indicators

Applications

This DEF sensor is suitable for various medium- and heavy-duty vehicles using Cummins or Paccar engines with SCR emissions systems. It’s commonly found in long-haul trucks, vocational equipment, and off-road machinery that rely on DEF to meet emissions control requirements.

Installation Notes

To install, disconnect the battery and remove the old unit carefully. Inspect the DEF tank for signs of crystallization or contamination. Ensure connectors are clean and dry before attaching the new sensor. Once installed, a diagnostic check may be required to reset system codes and verify accurate readings.

Final Thoughts

The OEM ASP61DS21-FG DEF Sensor offers the precision and reliability needed to keep your emissions system functioning smoothly. Whether you're maintaining a fleet or a single vehicle, this sensor helps prevent downtime and keeps you on the road—without unnecessary interruptions from system errors.