NOx Sensors and Their Role in Control

🧠 Part of the TuningBot ECU Knowledge Base — in-depth documentation on ECU logic, maps, emissions systems and safe calibration methods.

NOx sensors enable closed-loop control of SCR systems and provide emissions monitoring for diagnostics.

Sensor Locations

  • Upstream — measures engine-out NOx for dosing calculation
  • Downstream — verifies SCR conversion efficiency

Efficiency Monitoring

Conversion = (Upstream - Downstream) / Upstream × 100%

Target efficiency: 85-98% depending on conditions.

⚡

Sind Sie bereit, das volle Potenzial Ihres Motors freizusetzen?

Get a safe, high-quality tuning file prepared by TuningBot engineers — calibrated with real-world logic and validated best practices.

Get Your Custom File →