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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.