OTR Diagnostics redesigned layout helps you run advanced diagnostic functions, including a forced DPF regen from your mobile device easier than ever before.

Chassis Coverage
- Volvo Trucks — All Models
- Mack Trucks — All Models
What comes with the package?
- OTR Diagnostics App Download
- OTR Diagnostics 12 Month Subscription
- OTR Link - Mini Adapter
- OTR Crossover Adapter
- OTR OBD Adapter
- Instructions Manual

Volvo and Mack Commands
- OBD Plug / Harness
- EPA14/17 (2014-2023)
- Reset Fault Codes
- Reset Aftertreatment
- Start Forced DPF Regen
- EPA14/17 (2014-2023)
NOTE: OTR Diagnostics is not compatible with the OTR Reset Tool.
Engines Covered
Volvo Engine (OBD) | Emission |
D11 | EPA13, EPA17, EPA21 |
D13 | EPA13, EPA17, EPA21 |
D16 | EPA13 |
Mack Engine (OBD) | Emission |
MP7 | EPA13, EPA17, EPA 21 *MRU/LEU Supported |
MP8 | EPA13, EPA17, EPA21 |
MP10 | EPA13 |
How OTR Diagnostics Works
Set up in a few simple steps.

Step 1
Select diagnostics package for your engine

Step 2
Connect adapter to vehicle diagnostic port

Step 3
Download OTR Diagnostics app for your mobile device

Step 4
Begin using OTR Diagnostics app
Owner Operator
Customer Review
Voice of our customers
APP FEATURES

Enhanced Fault Code Descriptions
Read Fault Codes. You’ll be provided with enhanced detail fault code information.
For instance, you’ll see the following displayed:
SPN 5394 | FMI 3
- Aftertreatment diesel exhaust fluid (DEF) dosing valve
- Engine Controller
Detailed fault code information, will be provided such as description, troubleshooting, symptoms and possible fixes.

Fault Code Commands
Reset Active Fault Codes. Fault codes that determine that there is an existing issue. Certain active fault codes can be cleared, however, if the problem has not been fixed the fault code will reappear prompting you to seek service.
Reset Inactive Fault Codes. Fault codes that indicate that there was a previous issue.
Clear first-time ‘Ghost’ Codes. To get rid of ghost codes, all you have to do is reset the fault codes with OTR Diagnostics.
What’s a ghost code? Specific trucks will display fault codes on the dashboard, and most of the time you’ll have a check engine light or a check module message. After this, a screen will appear stating that the error has occurred. Many of the codes that appear on your dashboard fall into the category of “ghost” codes, meaning that the fault code was triggered by certain conditions that are nearly impossible to recreate. To get rid of ghost codes, all you have to do is clear fault codes with the OTR Diagnostics and clears the DTCs once. Note that if the fault code comes back a second time, you do need to take the matter seriously.

Aftertreatment Commands
Forced DPF regen. A forced DPF regen is performed when a diagnostic scan tool, such as the OTR Diagnostics, starts the regen process. The DPF soot load could be too high for a passive or active regen to occur, meaning you’ll need to perform a forced DPF regen.
Reset Ash Accumulators. Ash accumulators have stored values in the engine control module (ECM). Ash level includes measurement of ash in the DPF.
Reset DPF Accumulators. DPF accumulators have stored values in the engine control module (ECM). DPF level includes measurement of soot in the DPF.
Reset Aftertreament Learned Data. Measurement of learned data based on various engine components to adjust your injection timing based on characteristics of your engine sensor values.
Reset DPF Regeneration Timers. Measurement of time since the last DPF regen occurred. The calculation is based on time, miles driven, and fuel usage.

Fault code history and command history
Quickly reference recent fault codes, how often they occured and date stamp when it first occured.
View commands with status history for how long forced DPF regen lasted, clearing fault codes and reset aftertreatment status.

Display Parameters
Live data is information that gets updated in real time. This includes vital information about your engine and your aftertreatment system. The live data fields will be updated in real time through the Bluetooth connection.
Why is live data important? Live data is an important feature that can help solve an intermittent issue or it can be used to get more information from your aftertreatment system during a DPF regeneration.
Some of the parameters you can track with OTR diagnostics include
- DEF Fluid Level
- DPF Soot Level
- EGR Value Position
- Aftertreatment Exhaust Temps
- Battery Voltage
- Boost Pressure
- Accelerator Pedal Position
- Engine Fuel Delivery Pressure
- + many more
OTR Diagnostics FAQ
How does the subscription work?
Does this App need to be online to be used?
I currently have a compatible Bluetooth Adapter. How can I purchase only a subscription?
If I have an existing OTR Performance account, how do I link my OTR Diagnostics subscription to the account?
Which platforms Is OTR Diagnostics available for?
How do I create an account?
We have a couple of different ways to create an account. You can create an account on a web browser OR by using the mobile app. Follow the details below to get started.
Create account with otrperformance.com
- Create an account on a web browser at OTR Performance
- Purchase your subscription and use your email that is attached to your OTR account.
- Download and use credentials created to use the mobile application.
OR
Create account on the OTR Diagnostics mobile app
- You can register by using the app
- Purchase your subscription and use your email that is attached to your OTR account.
- Use credentials created to login into mobile "OTR Diagnostics" Application

60-Day Guarantee
We get it, you don’t know us very well yet. That’s why OTR Diagnostics comes with a 60-day, no-hassle, money-back guarantee. If this doesn’t fit your needs for any reason, just let us know within 60 days, and we’ll refund 100% of your purchase price. We’ve got your back.

USA Support
Located in Detroit MI, (EST). A truly committed team of trained experts that are there to assist with any customer service, technical support or general questions you may have. No bots. Real help from real people, when you need us! Contact us via phone, chat, or email anytime.
- This product will not bypass the operation of any emission control component. This is used solely to reset the modules after replacing aftertreatment components or initiating a forced regeneration.
- Phone and/or tablet not included.
- Reviews
- Questions

OTR Diagnostics for Volvo
The functionality is fine. The interface could be improved to make it more intuitive and easier to navigate. The worse part is the flashing LED and the pairing button on the adapter. On my Volvo, they point straight at the floor and I had to use an inspection mirror to see them.

Otr Volvo and Mack tool.
Fairly easy to use, did a parked regen and cleared the SCR code like it should. No codes have come back. We'll see how it does when I have other issues, so far I'm happy with it.

Nice
I like it . Very easy to use

Good
Okay i wish it had more control of functions and more in-depth diagnostics & troubleshooting, still a great buy.

Met Expectations
Good so far. Easy set up.

Best!
IT IS THE BEST!

The BEST!
I can't explain how greatly appreciated you guys are! Thanks for this tool! If u don't have it you hurting yourself must have! Excellent Job OTR


A good experience
We have been actively using the product and it lives up to the company’s claims. The support behind the product is top notch as well.


It works
Definitely does the job identify fault codes your able to clear them and will tell you want to replace so no guessing what part you need as far as sensors..also can re-set soot level and force a regen, this alone save $Money$, Time and a load of frustration, definitely this is a must have right now tool for anyone with ECM controlled engine..

Life saver
i want to say that this tool does what it said to do i bought this truck not knowing that the regen button not working, i bought this tool not knowing if is was going to work but man this tool soon i plug it and wait it to start, soon i heard the engine idle raised up i was so happy men wow i impressed this is a tool that every trucker should buy thanks OTR i will send driver to check your tools, very happy customer.....

Super super
All good

Payed for itself
I had a code and everyone keep give me the run around. I waited for my Otr tool to come in the mail and I was amazed on how easy it is to use. Having this tool can easily save you when you know the problem when taking to truck to the shop

Easy plug n play
Worked good so far..took a lil while to connect to it the first time. But I was able to use it to do a forced regen..It's a pricey device but it could save you time and money in the long run.