Built for your lifestyle
Compatible with diesel engines from Newmar, Tiffin, Entegra, Foretravel, Winnebago and more.
Diagnostic tool for modern motorhomes
Take matters into your own hands by diagnosing issues yourself, saving you a trip to the repair shop, avoiding unnecessary dealer visits, and helping you stay off the side of the road.
Diagnose on your terms
Read and reset fault codes. Understand what’s wrong and take action yourself without paying for a shop visit.
Engine coverage for all major brands
OTR Diagnostics gives you everything you need to manage maintenance effortlessly with dealer-level power and comprehensive tools. It’s like having OEM software in the palm of your hand.
Travel smarter. Save money.
One breakdown can cost thousands. Prevent breakdowns with early warning signs and reset capabilities, including forced regen, that keep you moving. It’s an investment that pays for itself quickly, often in one saved trip to the dealer.
Trusted by drivers who demand control over their diagnostics
Read why 98% of OTR customers would recommend OTR Diagnostics.
"OTR Diagnostics saved me a $1,200 trip to the dealer!"
— James
"Forced a regen from my cab and kept rolling. Best investment ever."
— Mike
This product paid for itself on the first use. Easy to use and understand.
— Robert
How OTR Diagnostics works
Designed for easy setup and no complicated software.
1. Plug in
Connect the OTR Diagnostics adapter to your vehicles diagnostic port
2. Sync to the app
Download the app and pair it with your adapter
3. Take control
View fault codes and send bi-directional commands instantly
Frequently Asked Questions
Will this work with my engine?
OTR Diagnostics is compatible with most motorhomes that use heavy-duty diesel engines, including Cummins, Detroit Diesel, and other common powertrains found in Class A RVs
Not sure if yours is supported? Use our vehicle compatibility checker to confirm before you buy.
What kind of maintenance can I perform with OTR Diagnostics on my motorhome?
With OTR Diagnostics, you can reset fault codes, perform DPF regens, monitor engine data, and track active and inactive issues. This helps prevent breakdowns and keeps you on the road longer without relying on a dealer.
Do I need a subscription for full access on my motorhome?
Yes, a Pro subscription is required for advanced functions like forced regens and enhanced diagnostics. One Pro subscription gives you complete engine coverage, making it ideal for maintaining your motorhome's diesel engine.
How quickly can I get started after receiving my OTR Diagnostics?
Setup takes less than 10 minutes. Simply plug the adapter into your motorhome's diagnostic port (usually located under the dashboard), download the free OTR Diagnostics app on your phone, and pair via Bluetooth. No technical expertise required - if you can use a smartphone, you can use OTR Diagnostics.
Can I use one device on multiple vehicles?
Yes! The OTR Diagnostics adapter can be moved between vehicles. This is perfect for RV owners who also have diesel trucks or multiple motorhomes. The app stores history for each vehicle separately, making fleet management simple.
What if I'm not tech-savvy? Is this difficult to use?
OTR Diagnostics was designed with simplicity in mind. The app uses plain English instead of technical jargon, provides clear explanations for each fault code, and offers step-by-step guidance. Plus, our customer support team is available to help you get started if needed.
How does OTR Diagnostics help prevent breakdowns?
By monitoring your engine's health regularly, you can catch issues early before they become expensive problems. The app alerts you to developing issues, explains their severity, and helps you decide if you can continue traveling or should seek service. Many problems can be resolved with simple resets or regenerations you can perform yourself.
Is there a warranty or money-back guarantee?
Yes, OTR Diagnostics comes with a 60-day money-back guarantee. If you're not satisfied for any reason, return it for a full refund. The hardware also includes a limited lifetime warranty against defects. We stand behind our product because we know it works.
Can OTR Diagnostics really save me money on repairs?
Absolutely. A single diagnostic check at a dealer typically costs $150-300. Emergency roadside diesel technicians can charge $500+ just to show up. With OTR Diagnostics, you can diagnose issues instantly and often fix them yourself. Many users report saving thousands in their first year alone.
What exactly is a DPF regen and why is it important for my motorhome?
DPF (Diesel Particulate Filter) regeneration burns off accumulated soot in your exhaust system. When this process fails, your motorhome can go into 'limp mode' or shut down entirely. OTR Diagnostics lets you force a regen when needed, preventing costly breakdowns and keeping you on schedule. This feature alone has saved countless RVers from ruined trips.
How often should I check my motorhome with OTR Diagnostics?
We recommend doing a quick scan before any long trip and monthly during regular use. Many RVers make it part of their pre-trip checklist along with checking tires and fluid levels. Regular monitoring helps you spot trends and catch issues before they leave you stranded.
Make diagnostics easier and more efficient
Unlock the full potential of your vehicle's diagnostics system with OTR Diagnostics, designed for seamless integration with your motorhome.