OTR Diagnostics
Pro Starter (6-Month)
- Core features included:
- FREE OTR Link 2 hardware ($299 value)
- OTR Assist AI Diesel Tech (basic Q&A)
- Michigan-based tech support
- Forced DPF regens anywhere
- Reset codes & derates
- Works on all engines 2008+
- 6-month cloud history
Pro Unlimited (Annual)
- Everything in 6-month PLUS:
- Unlimited OTR Assist Q&A
- VIP Priority Tech Support
- Full lifetime cloud history
- Free adapter replacement
- Free 2-day shipping
- Priority Assist (first in line for updates)
- Pays for itself in one repair
Select your Pro plan membership
What's included?
Hardware: This is the tool itself and adapter, supporting every engine we have coverage for, including: Cummins, Paccar MX, Detroit Diesel, Volvo, Mack, and more.
Pro membership: Included in the package. This provides access to our app, software, all updates, and new features at no additional charge
(auto-renews, cancel anytime).
60-Day | 100% Money-Back Guarantee
Limited Lifetime Warranty
Built and developed
in the USA
650+ 4.8-star customer reviews
Questions? Call us: (586) 799 - 4375
Explore the possibilities
More than just a code reader, OTR Diagnostics puts you in charge of your truck’s health. Whether you are checking fault codes before they become expensive problems, running regens on the road, or resetting derates to keep moving, it’s built to save you time and money while reducing downtime.
Backed by US-based support and proprietary hardware included with your plan, it is the all-in-one diagnostic solution designed for owner-operators who want control and confidence on every haul.
Product details
Commands available
Cummins commands
Detroit Diesel commands
Paccar MX commands
Volvo & Mack commands
Engines covered
Cummins engines
Detroit Diesel engines
Paccar MX engines
Volvo & Mack engines
Membership
Pro membership: Included in the package. This provides access to our app, software, all updates, and new features at no additional charge (auto-renews, cancel anytime).
Warranty
If you do not believe OTR delivers the value our 10,349 members trust us for, we will refund your entire membership within 60 days. No hassle. No risk.
Included in the Box
OTR Link 2 Bluetooth adapter
OBD to 9-pin adapter
OTR Pro membership
Quick start guide
Join 10,000+ who trust OTR Diagnostics
Listen to what they had to say
FAQs
What's included in my OTR Pro Membership?
Your membership includes the OTR Link 2 professional diagnostic adapter, full access to our iOS and Android mobile apps, unlimited dealer level diagnostics across all your trucks, OTR Cloud access where all your data is stored so you can reference it later, continuous software updates with new features added regularly, and tech support from our unbiased truck support team.
We're ready to help you with whatever questions come your way. We are on your side.
The mobile app connects to your adapter via Bluetooth, giving you complete control right from your phone or tablet, wherever you are.
The OTR Guarantee:
A single dealer or shop visit can cost over $500 and waste a full day. Avoid just one and your membership more than pays for itself. If OTR Pro does not deliver the value we promise, we will refund your membership in full within 60 days. Simple. Risk free.
Will this work on my trucks?
OTR Diagnostics provides complete coverage for all major diesel engines from 2008 onwards:
- Cummins (X15, ISX, ISC, ISL, ISB)
- Detroit Diesel (DD5, DD8, DD13, DD15, DD16)
- Paccar MX (MX 11, MX 13)
- Paccar PX (PX7, PX9)
- Volvo (D11, D13, D16)
- Mack (MP7, MP8, MP10)
One membership covers unlimited trucks. Just move the adapter between vehicles as needed.
Check your specific truck: View our complete vehicle compatibility guide to confirm your exact year, make and model.
What can I actually do with OTR Pro?
Beyond just reading codes, you get full dealer level capabilities:
- Force DPF regenerations on demand
- Reading fault codes including OEM P codes, all at the OEM level.
- Reset Fault Codes, this reset is the same as OEM diagnositic software,
- Reset aftertreatment systems, such as resetting 5mph derates, replacing your DPF Filter, and NOx sensors.
- Monitor live engine data in real time
- Run SCR performance tests
- Track your complete diagnostic history in the cloud
You're getting the same capability of commands that the dealers use, right on your phone.
We have a fleet of test trucks here at OTR to ensure everything we do is tested and throughly vetted to ensure everything works the first time.
How does OTR Pro save me money?
Here's the real math from our 10,349 active members:
- Average dealer diagnostic: $475 per visit
- Time waiting for appointment: 2 to 3 days lost revenue ($2,000+ for most loads)
- Average forced regen at shop: $400 plus 4 hours downtime
- One misdiagnosed problem: $1,500+ in unnecessary parts
Our members report saving an average of $3,200 their first year. That's real data from real truckers.
With OTR Pro, you diagnose immediately, fix only what's actually broken, and keep rolling. One avoided breakdown or tow bill (averaging $1,200) pays for your membership twice over.
What makes OTR different from other diagnostic tools?
Unlike basic code readers, OTR provides true dealer level access with the ability to run commands like forced regens, scr regens, reset dpf and more.
Your membership covers ALL engine brands with one tool (not just one manufacturer), includes continuous updates as truck technology changes, stores all your data securely in the cloud, and works perfectly on your existing phone or tablet. No expensive laptop needed.
What happens after my first year?
Your membership continues smoothly, keeping all your features, data, and benefits active. You can choose annual renewal or switch to monthly payments after year one.
Your diagnostic history stays saved forever in the cloud, even if you pause your membership. The hardware remains yours, and you can reactivate anytime to access all your historical data.
How quickly can I start diagnosing?
Order today and receive your hardware in 2 to 5 business days. Setup takes less than 5 minutes:
- Download the OTR Diagnostics app from the Apple App Store or Google Play Store
- Plug the adapter into your truck's diagnostic port
- Connect via Bluetooth through the app
- Start diagnosing immediately
No training needed. If you can use a smartphone, you can use OTR. Most members run their first diagnostic within minutes of unboxing.
Why do over 10,349 truckers trust OTR Diagnostics?
Because it delivers on its promise: total control over your maintenance, 24/7.
Our members never worry about surprise breakdowns, expensive diagnostic fees, or being sold unnecessary repairs. When you're broken down at 2 AM, you'll understand why so many drivers won't run without it.
With lifetime hardware protection, if your adapter ever fails while you're an active member, we'll replace it free. That's our commitment to keeping you on the road.