Fast Testing · Save Time · Smart Analysis
Proformance NOx Sensor Tester
NOx sensor testing made simple.
Trusted by 500,000+ Users Worldwide
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 needed. Automatically detects voltage (12V/24V) and J1939 protocol — supports Cummins, Freightliner, Kenworth, Navistar, John Deere, Volvo, Mack, Hino, Isuzu, International, Western Star, Ford, Detroit, and more
How It Works
Three simple steps to test your NOx sensor with definitive results in minutes
Connect NOx Sensor
Connect the Proformance NOx Sensor Tester directly to the NOx sensor
Run Test
No manual protocol selection needed. Automatically detects voltage (12V/24V) and J1939 protocol — supports Cummins, Freightliner, Kenworth, Navistar, John Deere, Volvo, Mack, Hino, Isuzu, International, Western Star, Ford, Detroit, and more
View Results
Get a clear pass/fail verdict and generate a professional PDF report
Connect NOx Sensor
Connect the Proformance NOx Sensor Tester directly to the NOx sensor
Run Test
No manual protocol selection needed. Automatically detects voltage (12V/24V) and J1939 protocol — supports Cummins, Freightliner, Kenworth, Navistar, John Deere, Volvo, Mack, Hino, Isuzu, International, Western Star, Ford, Detroit, and more
View Results
Get a clear pass/fail verdict and generate a professional PDF report
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.
NOx Sensor Compatibility
Enter an OEM part number, a 5WK reference, or an SNX model to instantly check tester compatibility.
Proformance vs. Traditional Testers
See how Proformance NOx stacks up against traditional testers.
Traditional Testers
30-Day Money Back Guarantee
Frequently Asked Questions
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