NOx Sensor Tester
Advanced Diagnostics
NOx Sensor Tester + Fast Testing + Save Time
Trusted by Over 300,000 Members
Meet Proformance.
Advanced diagnostics,
right in your hand.
13+
Years of Diagnostic Expertise
6M+
Compatible Vehicles
99%
Customer Satisfaction
Our Story
For over 13 years, Proformance has built diagnostic tools for people who keep vehicles moving. Designed by a world-class engineering team and proven in real-world fleets, our portable platform turns complex vehicle data into clear, fast insight.
What's Next
Now expanding across North America, we bring professional-grade diagnostics to drivers, fleets, and repair shops in a simpler, more accessible way-so you can reduce downtime and make every decision with confidence.
Everything you need.
Nothing you don't.
All Makes & Models
Quickly read and understand fault codes across most commercial vehicles and equipment-without needing advanced technical knowledge.
Driver-Friendly Diagnostics
Clear, actionable information so drivers and fleet managers know what's happening before it becomes a breakdown.
Faster Decisions
Decide whether to keep rolling, schedule service, or prevent a costly roadside repair.
↓ 40%
avg. downtime reduction
One Tool, More Control
Monitor vehicle health, reduce guesswork, and simplify diagnostics with one powerful solution.
6M+
compatible vehicles
13+
Years Experience
99%
Satisfaction Rate
24/7
Monitoring Support
Capabilities
Advanced Diagnostics & Repair
Professional-grade capabilities, made simple for everyday use
OEM-Level Diagnostics
Access deep, OEM-level data including fault codes, live parameters, and system status across major commercial vehicle platforms.
Mobile App Connectivity
Use an intuitive mobile app to view diagnostics, monitor vehicle health, and manage reports anytime, anywhere—right from your phone or tablet.
Special Functions
Perform essential service and reset functions with guided workflows that simplify advanced operations and reduce reliance on multiple tools.
Free Tool
Free Proformance Insight™ Tool
Instant fault code insights—no tool required
Access the Free Proformance Insight™ Tool to quickly look up fault codes and view clear explanations and suggested repair information—anytime, anywhere. Designed for drivers, fleets, and service teams, Proformance Insight™ helps you understand what's happening before you make your next move.
Whether you're on the road or managing vehicles from anywhere, this free resource gives you the confidence to make informed decisions, reduce downtime, and avoid surprises.
Explore Proformance Insight™Partners
Become an Authorized Dealer
Join our network to grow your business
Partner with Proformance Diagnostics and gain access to innovative diagnostic solutions, dealer-only benefits, and ongoing support designed to help you expand your reach and increase revenue.
Learn MoreFAQ
Frequently Asked Questions
Find answers to common questions about our products and services
ProFormance USA is a comprehensive vehicle diagnostic solution that provides real-time monitoring, fault code reading, and remote command execution for commercial vehicles. Our tools help drivers and fleet managers maintain optimal vehicle performance and prevent expensive breakdowns.
Our diagnostic tools are compatible with 6+ million vehicles globally, including trucks from major manufacturers like Peterbilt, Kenworth, Mack, International, Freightliner, Volvo, and Detroit. We support vehicles with J1939 and J1708 protocols.
Simply plug the Proformance Link device into your vehicle's diagnostic port (usually located near the driver's seat or dashboard). The device will automatically connect via Bluetooth to your smartphone or tablet running our mobile app.
Our mobile app provides real-time data monitoring, fault code reading and clearing, DPF regeneration commands, historical data tracking, maintenance reminders, and detailed diagnostic reports. The app works on both iOS and Android devices.
Yes! One of our key features is remote DPF (Diesel Particulate Filter) regeneration. You can initiate forced regeneration directly from your mobile device, helping prevent costly towing and downtime.
Our basic diagnostic features are included with your hardware purchase. Premium features like advanced analytics, cloud storage, and fleet management tools may require a subscription. Check our pricing page for detailed information.
We offer comprehensive technical support Monday–Friday, 8AM–6PM EST. Our support team includes certified technicians who can help with installation, troubleshooting, and advanced diagnostic procedures. Support is available via phone, email, and live chat.
We take data security seriously. All data transmission is encrypted, and we follow industry-standard security protocols. Your vehicle data is stored securely and is never shared with third parties without your explicit consent.
All our diagnostic hardware comes with a 2-year manufacturer warranty covering defects in materials and workmanship. We also offer extended warranty options and replacement programs for professional users.
We release regular software updates to add new vehicle coverage, improve functionality, and fix any issues. Updates are automatically delivered through our mobile app and are free for all users.