Fast Testing · Save Time · Smart Analysis
Proformance NOx Sensor Tester
Professional NOx diagnostics for diesel aftertreatment.
Trusted by 300,000 Drivers
Stay Ahead of Costly Breakdowns
No complicated tools, no confusing codes—just clear answers in a few taps.
Why Proformance? Because Time is Money.
In trucking, downtime costs. The Proformance NOx Tester gives you definitive NOx sensor test results in about 3 minutes—know if the sensor is faulty before you replace it.
Eliminate "Parts Darting"
NOx sensors are expensive ($500–$1,000+). Don't replace them based on a hunch. Get definitive proof before you open a new box.
Dealer-Level Accuracy in Your Pocket
Skip the 3-week wait at the dealership. Perform deep-level diagnostics right on the roadside or in your shop.
Active-Scan™ & J1939
No manual protocol selection. Automatically identifies voltage (12V/24V) and J1939 protocols for Bosch, Continental, Cummins, or NGK.
How It Works
Three simple steps to get started with easy and efficient diesel vehicle diagnostics
Connect Device
Insert the Proformance Link device into your vehicle's OBD2 diagnostic port
Connect App
Pair and connect with the Proformance mobile app via Bluetooth
Start Diagnostics
Monitor vehicle data in real-time and enjoy worry-free driving
Connect Device
Insert the Proformance Link device into your vehicle's OBD2 diagnostic port
Connect App
Pair and connect with the Proformance mobile app via Bluetooth
Start Diagnostics
Monitor vehicle data in real-time and enjoy worry-free driving
Time is money. With the Proformance NOx Sensor Tester, get definitive NOx sensor test results in minutes—on the roadside or in your shop. No dealership wait, no parts guessing.
Universal Compatibility
Full coverage for Class 7–8 trucks (Freightliner, Kenworth, Peterbilt, Volvo, Mack) and heavy equipment. One tool, many platforms.
Hassle-Free Updates
Simply plug in—no tricks, no hassle. Free lifetime OTA updates keep your NOx Tester current for the latest model years.
USA Quality & Support
Designed by professional diesel technicians. Generate professional NOx detection reports to justify repairs directly to your customers.
Proformance vs. Traditional Testers
See how Proformance NOx stacks up against traditional testers.
Traditional Testers
30-Day Money Back Guarantee