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Pro diagnostic tools for every semi truck owner - from O/O to fleet operations
PRO PLAN
Perfect for owner-operators and RV owners
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Call (586) 799-4375 for fleet pricing
Explore the possibilities
Reset 5mph Derate
A 5 mph derate can cost you thousands in towing, downtime, and dealer diagnostics.
OTR Diagnostics gives you dealer-level reset commands right on your device.
Simply plug in, read the exact fault, and reset the derate yourself. No tow, no waiting, no lost loads.
Run SCR tests
OTR Diagnostics gives you the ability to run an SCR efficiency regen, a dealer-level command that restores your system’s performance.
Plug in OTR Diagnostics, select the SCR efficiency regen command, and complete the process yourself without waiting on a shop.
Read active and inactive fault codes
Get a 1:1 match of what dealership software sees, including OEM P-Codes, and unlock detailed explanations of each fault code.
Understand not just the code, but the specific issue and suggested fixes.
Empower yourself to perform your own repairs with guided diagnostics and easy-to-follow repair suggestions tailored to your truck's specific needs.
Monitor vehicle live data
Live data allows you to see and address issues as they happen, preventing minor problems from becoming major breakdowns.
With real-time data, you can diagnose issues with greater accuracy. No more guesswork.
Monitor things like:
- DPF soot and ash levels
- DEF fluid level
- Battery voltage
- Intake pressure (turbo boost)
- EGR valve position
- Exhaust and DPF temperatures
- SCR temperatures
- Engine fuel delivery pressure
- Engine hours
and more...
Send dealer-level commands
Commands that keep you moving are built right into OTR Diagnostics, giving you dealer-level power at your fingertips.
With bi-directional commands, you’re no longer stuck waiting on a shop to handle what you can do yourself.
- Reset active and inactive fault codes
- Reset the entire aftertreatment system
- Reset derates that slow you down
- Reset soot levels
- Run forced DPF or SCR regens right from the cab
These commands put you back in control of your truck, keeping you on schedule and out of the waiting room.
Command and fault history
Keeping your fault codes safe.
All fault codes are securely stored in the cloud, giving you access anytime and anywhere. This is helpful for tracking down recurring issues and analyzing intermittent 'ghost codes' that come and go.
Access to all your vehicles
OTR Cloud is a cloud-based platform that provides diagnostic insights for fleets. It allows you to monitor fault codes, commands, and vehicle health across your entire fleet from anywhere.
By offering diagnostic insights into fault codes and maintenance needs, OTR Cloud helps you proactively address issues before they lead to breakdowns.
Fleet managers can access comprehensive fault details, understand code causes, and share data with technicians to expedite repairs.
Universal engine coverage
Engine coverage for all major brands
- Dealer-level power: Imagine having the power of OEM dealer-level software right in the palm of your hand.
- One Pro membership covers all: With just one Pro membership, you gain access to complete engine coverage.
Engines
- Cummins 2008+ | X15, X12, ISX, ISC 8.3, ISL 9, ISB 6.7
- Volvo 2014+ | D11, D13, D13TC, D16
- Mack 2014+ | MP7, MP8, MP8HE, MP10
- Detroit Diesel 2008+ | DD5, DD8, DD13, DD15, DD16
- Paccar MX 2011+ | MX-11, MX-13
- Paccar PX 2008+ | PX-6, PX-7, PX-8, PX-9
The real math on savings
Our 10,349 members save an average of $3,200 in their first year
Dealer Diagnostic Fee
Without OTR: $475
With OTR: $0
Forced Regen at Shop
Without: $400 + 6 hours
With OTR: Free + 30 min
False Derate Code
Without: Tow + shop + lost loads
With OTR: Clear it, keep rolling
Check out some of our 580+ 4.9-star Google reviews
Everything included
You will receive an OTR Link 2 Bluetooth adapter ($199 Value), an OBD to 9-pin adapter, and instant access to our US-based tech support. All OTR devices are covered under a limited lifetime warranty.
Takes less than 15 seconds to confirm your engine
We cover most heavy-duty diesel engines like Cummins, Paccar, Mack, Volvo, Detroit Diesel, and more.
"This product paid for itself on the first use. Easy to use and understand, and prevents small problems from turning into bigger problems."
- Robert Purser | Google Review
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.