Bi-directional commands
- Cummins
- Detroit
- Paccar
- Volvo
- International
- Mack
Send bi-directional commands with OTR Diagnostics
Dealer-level commands from the cab, on your phone. No tow. No diagnostic fee. No two-day appointment.
- 60-day money-back guarantee
- Adapter included free
- Built in Detroit, MI
Key features
- Reset a derate
- Forced DPF regen
- Read & reset fault codes
- SCR performance test
- Live data monitoring
All included on every plan.
Bi-directional commands · priced in what they save you
Replace a bill you've already paid before.
These aren't features — they're invoices you stop receiving. Average costs below are what members report paying shops and dealers before switching.
Clear a derate from the driver's seatCommand: Reset Aftertreatment Avoids on average$1,300 tow
A 5-MPH SCR derate is the most expensive fault your truck can throw — not because of the part, but because you can't get to the shop without a hook. Reset the derate from the cab, restore full power, and drive to the fix on your terms.
How it plays out: the inducement hits on a Sunday. The old way: a $1,300 tow plus waiting for Monday. With OTR: reset it, finish the load, schedule the repair yourself.
Burn off soot yourselfCommand: Forced DPF Regen Replaces a$300 shop regen
When soot loads up and a passive regen won't cut it, the shop charges around $300 and half your day to do what your engine can do parked. Run a forced regen in 30–45 minutes while you eat lunch.
Our most-used command: members have completed 100,000+ forced regens with OTR Diagnostics.
Read and reset faults before anyone charges youCommand: Reset Fault Codes Skips the$400 diagnostic fee
Shops charge around $400 on average just to plug in and tell you what you could see yourself. Read the fault, see what it means in plain English, clear it after the fix — and only pay a shop when there's actual wrench work.
Know before you go: half the battle is knowing whether it's a $40 sensor or a real repair.
Test your SCR before it derates youCommand: SCR Performance Test Prevents the next$2,000 surprise
The SCR system fails slowly, then derates you suddenly. Run the same performance test the dealer runs and catch a dying NOx sensor or DEF issue weeks before it becomes an inducement on a load.
Maintenance, not emergency: you pick when and where the repair happens.
Install your own aftertreatment filterCommand: Aftertreatment Filter Installation Ends thedealer-only visit
Swapping the DPF at a maintenance interval is a bolt job — but the ECM needs to be told it happened, and dealers charge a visit for that handshake. Do the install, run the command, done.
DIY maintenance stays DIY — no appointment just to close out your own work.
Tap any command to see how it plays out on the road
Dollar figures are member-reported averages for tows, dealer diagnostic fees, and shop regens. Your rates vary by region — which is exactly why doing it yourself wins everywhere.
In the app
Commands that keep you moving
Perform bi-directional, dealer level, commands such as:
- Reset active codes and inactive codes
- Reset Aftertreatment system
- Reset Derates
- Reset Soot
- Forced DPF Regen
- Forced SCR Regen
The math on one bad day
One derate. Two ways it can go.
Without OTR Diagnostics
With OTR Diagnostics
Figures assume each line happens once. Tow, diagnostic and regen costs are member-reported averages and vary by region.
OTR Diagnostics
More than commands
View fault codes
You don’t just see the fault codes, you learn what they actually mean. This helps you fix problems fast and gets your truck back on the road quickly.
Real time live data
Access live data parameters from your engine and aftertreatment systems to troubleshoot.
View history
All of the truck information is stored in the cloud, making it easy to get access to this information.
OTR Diagnostics hardware
We break down the hardware that comes with your OTR Diagnostics purchase.
600+ Google reviews
Proof from the people sending the commands.
I would recommend this diagnostic tool to any truck driver out there.
K O311
Google Review
One of the best apps to keep track of your aftertreatment.
Michael Erb
Google review
In my opinion this is a must have for any small operation
Manny Choate
Google Review
I recommend every truck owner / fleet / mechanic should have this device
Bill Chohan
Google Review
Get started
Every command above, on every plan.
Each plan includes the OTR Link 2 adapter free ($299 value), all commands above, OTR Assist AI, live data, and US-based support from Detroit.
60-day money-back guarantee · free 2-day shipping · cancel anytime