Your aftertreatment system is a ticking time bomb. Take control before it takes you down.
Force DPF regens, clear DEF faults, reset NOx codes - the same dealer commands that cost $300 per visit, now in your hands 24/7.
The modern truck reality nobody talks about
EPA regulations created problems only dealers could fix. Until now.
🔴 "Check Engine" at 2 AM
You're 400 miles from home. The engine light comes on. Is it serious? Can you make it home? Should you shut down? Without diagnostics, you're gambling with a $20,000 engine.
🐌 5 MPH Derate Nightmare
Your DEF quality dropped. Now you're crawling at 5 MPH to the nearest dealer. $800 tow, $300 diagnostic fee, 3 days in a hotel. All for a 10-minute reset.
♻️ DPF Won't Regen
Soot level at 80% but truck won't start a regen. You know it's coming - that derate warning. But you can't force it without dealer software. So you wait for disaster.
💸 Mystery NOx Codes
P20EE, P207F, P2201 - which sensor is bad? Inlet or outlet? Bank 1 or 2? Dealers charge $300 just to tell you. Then $1,200 to replace a $300 part.
⏰ Weekend Breakdown
Friday night, dealer closed until Monday. You're losing $800/day sitting. Even if it's something simple you could fix yourself - if only you knew what was wrong.
🔄 DEF System Nightmares
Poor quality DEF crystallizes in your SCR system. Now you need a "crystal sublimation cycle" - a dealer-only procedure that costs $500+. Or does it have to be dealer-only?
The worst part?
These aren't mechanical failures.
Your truck isn't broken. It's being held hostage by software that only dealers could access. One command, one reset, one forced regen - and you're back on the road.
Why should only dealers have this power?
Finally, real solutions for aftertreatment problems
Other diagnostic tools just read codes. OTR Diagnostics actually fixes aftertreatment issues.
🔧 Force DPF Regeneration
When your DPF is full and the truck won't regen on its own, force it manually. No more waiting for "conditions to be right" or driving in circles hoping it starts.
⚡ Reset Aftertreatment Derates
Clear those stubborn aftertreatment system derates that limit your speed and power. The same reset commands that dealers charge $300+ to run.
💎 Crystal Sublimation Regen
Run advanced SCR cleaning cycles to clear DEF crystal buildup. This dealer-only procedure usually costs $500+ at the shop.
📊 Live Aftertreatment Data
Monitor DPF soot load, DEF quality, NOx sensor readings, and exhaust temps in real-time. See exactly what your aftertreatment system is doing.
The Truth: Modern trucks fail because of aftertreatment issues more than anything else. Other tools can tell you "NOx sensor fault" - but only OTR gives you the power to actually fix it.
Replace the sensor yourself, clear the code, reset the system, and verify the repair with live data.
You become your own technician.
Take ownership of your destination
Join 10,315+ drivers who no longer fear breakdowns
✓ Diagnose Like a Pro
What's the P20EE code? That's your NOx catalyst efficiency. With OTR, you'll know it needs an inlet NOx sensor, you'll replace it yourself for $300 instead of paying the dealer $1,200.
✓ Fix It Right There
Run the exact same resets and commands the dealer uses. Clear codes properly, reset adaptations, and verify the repair worked - all from your driver's seat.
✓ Prevent Future Problems
Watch your DPF soot load climbing? Force a regen before it derates. DEF quality dropping? Change it before the NOx sensors fail. Stay ahead of problems.
✓ Document Everything
Every code, every fix, every command - saved forever in the cloud. Prove your maintenance to buyers, warranty claims, or just track your truck's health over time.
"It's not about avoiding the dealer completely. It's about knowing exactly what's wrong, fixing what you can yourself, and only paying for repairs you actually need."
See how simple it really is
3 simple steps:
Plug & Connect
OTR Link 2 plugs into your diagnostic port. App connects automatically.
Read & Understand
See fault codes in plain English. AI tells you exactly what's wrong and how to fix the issue.
Fix & Verify
Run dealer commands: force regens, clear derates, reset systems. Verify the fix with live data.
If you can check Facebook, you can use OTR.
"But I saw a $300 - $400 scanner that does DPF regens..."
One regen function isn't enough when you're stranded.
Can it do SCR regeneration? Reset after DPF replacement? Clear NOx adaptations?
When you need help at 2 AM, will a US mechanic answer?
There's a reason 10,315 professional drivers chose OTR over cheaper options. Because "it can do a regen" doesn't mean it can get you back on the road.
See how much you'll save
Stop wasting money on breakdowns and shop visits
What You're Spending Now
Let's check your vehicle
Get dealer-level power at a fraction of the cost.
Save an average $3,200 from shop visits and tow bills
Get started for $399
Join 10,000+ who trust OTR Diagnostics
Listen to what others had to say
FAQ
Can OTR clear every derate?
We can clear most aftertreatment-related derates. If it's a software-resettable issue (like after replacing a NOx sensor or completing a DPF regen), OTR has the dealer-level commands to clear it. For mechanical failures that need parts replaced, we'll tell you exactly what's wrong so you can fix it yourself or tell the shop precisely what you need - no more expensive diagnostic fees.
What if I change trucks or sell my truck?
No problem! Your subscription follows YOU, not the truck. There are no VIN locks. Take your adapter to any truck you drive. Buying a new truck? Same subscription works. Selling? Keep it for the next one. Complete flexibility.
Will this void my warranty?
No. OTR uses the same diagnostic protocols as dealers. We only read data and run manufacturer-approved resets. It's like having a dealer technician in your pocket. We provide documentation if ever needed.
I'm not tech-savvy. Can I use this?
Yes! It's literally 3 steps:
1) Plug in the adapter
2) Open apthe p on your phone
3) Follow simple instructions.
Plus, OTR Assist AI explains everything in plain English. If you can pump diesel, you can use OTR. And our US-based support is always ready to help.
I only drive 6,000 miles/year in my RV. Is this worth it?
Absolutely! RV breakdowns are the worst - you're often in remote areas with limited shop options. One breakdown can cost $2,000-5,000 between towing, hotels, and repairs. Using OTR just 2-3 times per year more than pays for itself. Plus, you get peace of mind knowing you can handle issues anywhere.
I only drive my RV occasionally. Is this worth it?
RV owners love OTR. When you're 500 miles from home in a national park, finding a diesel shop that knows motorhomes is nearly impossible. One aftertreatment issue can ruin a $10,000 vacation. Many RV owners tell us the peace of mind alone is worth the price, plus you'll actually know what's wrong before calling a mobile mechanic.
How is OTR different from $300-400 diagnostic tools on Amazon?
Those tools might do a forced DPF regen, but that's where they stop. What happens when you need an SCR regeneration? Or need to reset the aftertreatment system after replacing a DPF filter? Or clear adaptations after changing NOx sensors? These tools can't do it. OTR gives you ALL the resets: DPF reset after filter replacement, SCR system resets, NOx sensor adaptations, DEF quality resets, and more. Plus, OTR is engineered in Michigan specifically for US trucks, tested on our fleet, and backed by US-based mechanics who actually know diesel engines.
What aftertreatment functions can OTR actually perform?
All the critical ones dealers charge $300+ for: Forced DPF regeneration when automatic won't work. SCR regeneration to clean your DEF system. Crystal sublimation cycles to remove DEF buildup. DPF replacement reset after installing new filter. NOx sensor adaptation reset after replacement. DEF quality reset after contamination. Aftertreatment system initialization. Soot level reset. These aren't available on generic tools - only OTR and dealer software can perform these functions.
Why is OTR more when other tools are $300-400?
Because those tools leave you stranded when you need real help. They might force a DPF regen, but can't do SCR regens, can't reset after DPF replacement, can't clear NOx adaptations. You'll still end up at the dealer paying $300+ per reset. OTR includes ALL dealer-level resets, plus AI diagnostic help, cloud history, and US-based support. One avoided dealer visit pays for the difference. Plus, you're getting a tool engineered and tested in Michigan on real US trucks, not generic software from overseas.
What engines and years do you support?
All major engines from 2008-2025+: Cummins (ISX, X15, ISB, ISL, ISM), Detroit (DD13, DD15, DD16, Series 60), Volvo/Mack (D11, D13, D16, MP7, MP8, MP10), PACCAR (MX-11, MX-13, PX-7, PX-9), and more. If your truck has an aftertreatment system (DPF/DEF), we support it. Not sure? We offer a 60-day money-back guarantee.
Why do I need all engine coverage if I only have one truck?
Future flexibility and helping others. You might change trucks, help a friend on the road, or work on different engines. Buying each engine separately costs $200+ each. With Pro, you get all engines for one price. Plus, no VIN locks means you can use it on any truck - rental, loaner, or your next purchase.
What exactly can I do myself with OTR?
More than you think: Replace sensors (NOx, temp, pressure) and clear codes properly. Run forced DPF regenerations when the truck won't do it automatically. Reset aftertreatment derates after repairs. Clear DEF quality faults after changing fluid. Monitor system health to prevent problems. The AI assistant guides you through each repair with step-by-step instructions.
Will this work with my fleet management system?
Yes, and it fills the gaps. Fleet management shows you location and basic codes. OTR gives you the deep diagnostics and repair capabilities your fleet system can't provide. Many fleet managers use OTR to fix issues remotely through their drivers, avoiding costly service calls. The Fleet plan includes multi-user access for your whole team.
How does the 60-day guarantee work?
Simple - if OTR doesn't save you money, we refund everything. Try it for 60 days. If it doesn't work on your truck, doesn't save you a shop visit, or you're not completely satisfied, we'll refund your full purchase. No restocking fees, no shipping charges, no hassles. We even email you a prepaid return label. That's how confident we are in OTR.
Take control. Don’t wait until it’s too late!
Avoid costly downtime and dealer fees. Get OTR Diagnostics and stay on the road.
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