Tailored Emissions Accuracy: TEMSA Cummins DEF Head Unit
What is it?
The TEMSA Cummins DEF Head Unit is a specialized emissions control module designed for TEMSA buses and coaches powered by Cummins ISB or ISL engines. It precisely meters Diesel Exhaust Fluid (DEF) into the exhaust stream to neutralize nitrogen oxide (NOx) pollutants. Integrated sensors continuously monitor fluid level, temperature, and pressure to ensure accurate dosing and reliable SCR system function.
Why choose a TEMSA-specific DEF Head Unit?
Engineered for seamless integration with TEMSA chassis and Cummins engine control systems, this DEF Head Unit aligns directly with factory wiring and ECM calibration. This eliminates the risk of SCR fault codes, engine derates, or system mismatches that can arise when using generic replacements. Built to OEM-grade durability, it guarantees plug-and-play performance under demanding transit conditions.
Key Benefits
✅ Plug‑and‑play compatibility with TEMSA vehicles equipped with Cummins ISB or ISL engines
✅ Precisely controls DEF dosing to meet strict NOx reduction requirements
✅ Onboard sensors actively monitor DEF fluid level, pressure, and temperature
✅ Designed to resist thermal cycling, DEF crystallization, and vibration
✅ Helps prevent SCR-related fault codes, limp-mode events, and compliance failures
Applications
Ideal for TEMSA transit buses and coach platforms powered by Cummins ISB or ISL engines. This DEF Head Unit ensures SCR system reliability and emissions compliance during stop-and-go routes, interstate operations, and heavy-duty passenger transport use.
Installation Notes
Before installation, power down the system and depressurize the DEF tank. Clean the tank and fluid connectors to eliminate residue or crystal buildup. Install the head unit using OEM-style connectors and secure all fluid and electrical connections properly. Once installed, clear any error codes and verify DEF dosing and sensor outputs with a diagnostic scanner to confirm proper operation.
Final Thoughts
If your TEMSA Cummins-powered vehicle is encountering DEF system faults or SCR derates, the TEMSA Cummins DEF Head Unit delivers the OEM-grade solution you need. Built for reliable emissions control, compatibility, and performance, it restores DEF functionality and keeps your ride clean and mission-ready. Available now at Tamerx—trusted parts for efficient fleet operation.