Heavy-duty engine diagnostics made simple.
Read and clear fault codes, real-time live data, and advanced commands.Learn More
We offer diagnostics for Cummins, Detroit Diesel, Paccar MX & PX, Caterpillar, Volvo, Mack, International, Cummins off-highway and Volvo off-highway engines.
Select Subscription Plan, Diagnostic Adapter For Your Engine
Connect Adapter To Vehicle Diagnostic Plug
Download OTR Diagnostics App For Your Mobile Device
Begin Using OTR Diagnostics App
We get it, you don’t know us very well yet. That’s why our products comes with a 60-day, no-hassle, money-back guarantee. If they don't fit your needs for any reason, just let us know within 60 days, and we’ll refund 100% of your purchase price. We’ve got your back.
Located in Detroit MI, (EST). A truly committed team of trained experts that are there to assist with any customer service, technical support or general questions you may have. No bots. Real help from real people, when you need us! Contact us via phone, chat, or email anytime.