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 Model
- Mack Trucks– All Models
- Freightliner - All Models
- Western Star - All Models
- Peterbilt - All Models
- Kenworth - All Models
- Sterling - All Models
- International - All Models - (Cummins only)
Engine Coverage
- Volvo Engines
- Mack Engines
- Cummins Engines
- Detroit Diesel Engines
- Paccar MX and PX Engines
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

Commands
Volvo | Mack - 9 Pin Plug
- EPA07/EPA10 (2007-2013) - No coverage yet
Volvo | Mack - OBD Plug / Harness
- EPA14/17 (2014-2021)
- Reset Fault Codes
- Reset Aftertreatment
- Start Forced DPF Regen
Detroit Diesel | Freightliner | Western Star | Based on EPA Version or year
9 Pin Plug
- EPA07 (2007-2010) DPF Only
- Reset Fault Codes
- Reset Ash Accumulator
- Start Forced DPF Regen
- EPA10 (2011-2013)
- Reset Fault Codes
- Reset Ash Accumulator
- Reset SCR Accumulator
- Start Forced DPF Regen
- EPA14 (2014-2016)
- Reset Fault Codes
- Reset Ash Accumulator
- Reset SCR Accumulator
- Start Forced DPF Regen
- EPA17 (2017-2021)
- Reset Fault Codes
- Reset Ash Accumulator4
- Reset SCR Accumulator4
- Start Forced DPF Regen
9 Pin Plug (Black connector on truck side)
Paccar 9 Pin CAN Adapter (Green connector on truck side) (2016-2020)
- EPA10 (2011-2013)
- Reset Fault Codes
- Reset EGR Derate
- Reset 5MPH DEF Derate
- Start Forced DPF Regen
- EPA13 (2014-2016)
- Reset Fault Codes
- Reset EGR Derate
- Reset 5MPH DEF Derate
- Start Forced DPF Regen
- EPA17 (2017-2019)
- Reset Fault Codes
- Reset EGR Derate
- Reset 5MPH DEF Derate
- Start Forced DPF Regen
- EPA17 (2019-2021)
- Reset Fault Codes
- Reset 5MPH DEF Derate
- Start Forced DPF Regen
9 Pin Plug
- EPA07 (2007-2010)
- Reset Cummins Fault Codes
- Reset Generic Fault Codes
- Reset Aftertreatment
- Start Forced DPF Regen
- EPA10 (2011-2013)
- Reset Cummins Fault Codes
- Reset Generic Fault Codes
- Reset Aftertreatment
- Start Forced DPF Regen
- EPA13 (2014-2016)
- Reset Cummins Fault Codes
- Reset Generic Fault Codes
- Reset Aftertreatment
- Start Forced DPF Regen
- EPA17 (2017-2021)
- Reset Cummins Fault Codes
- Reset Generic Fault Codes
- Reset Aftertreatment
- Start Forced DPF Regen
NOTE: OTR Diagnostics is not compatible with the OTR Reset Tool.
HOW DIAGNOSTICS WORKS
Set up in a few simple steps.

Step 1
Select Subscription Plan, Diagnostic Adapter For Your Engine

Step 2
Connect Adapter To Vehicle Diagnostic Plug

Step 3
Download OTR Diagnostics App For Your Mobile Device

Step 4
Begin Using OTR Diagnostics App
OTR Diagnostics
Owner Op - Review
OTR Diagnostics
2016 Peterbilt 579
OTR Diagnostics
Owner Op - Gary
OTR Diagnostics
Owner Op - Jack
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
Works great , saved me a lot of money

Freightliner 2016 ISX
Really enjoy this product Recommend this to everyone that is an owner operator like myself.

Shepherd1
Love it. I bought it with the intention of being able to limp a trk to a repair shop if necessary to avoid expensive tow trucks. After using the product. I’ve made it mandatory that all my def trucks have one in them. So far we’ve installed 4 units all have paid for them selfs with 90 days. We’ve been able to pull better codes and do several repairs ourselves instead of a expensive shop. We also had a automatic truck throw a code in the middle of I-25 in Denver Colorado at rush hour traffic blocking traffic with a transmission error code. Driver was able to reset code and drive truck away in just a couple minutes. Turns out was a ghost never came back. We also have been doing 1-2 park regens a week with the tool. 2 of our trucks have started getting over 1 mpg more on average by keeping the dpf filter cleaner. At FJB fuel prices this is a great savings. Thanks OTR

With the problems I’ve had this product has made me my money back with in 2 weeks
Easy to use live read outs clear fault codes help to figure out what to fix

OTR DIAGNOSTIC PROFESSIONAL
It is really helpful and easy to use.. Thanks a lot !

Excellent
I love my otr product it is my best decision ever.

OTR tool performance
It’s an amazing tool I have repaired 4 of my trucks in a month and kept them running. The first two repairs I did literally covered the cost of what I paid for the tool. The only downside it’s has limitation of not being able to do more refine diagnostic

single member
refer a friend frd shelton

Saves time and money
I can see the codes myself to determine whether or not the problem is real or just a spike. Reset DPF errors in minutes and be back on the road instead of having to do a parked regen to reset a derate event.

Happy with it
Good. Worked exactly as it was advertised. Thanks

I recommend everyone should have one.
I am satisfied with purchasing this device, it comes in handy when check engine light turns on. I was able to save thousands and pinpoint what is wrong with my trucks. To all out owner operators to fleet owners and drivers. this item will save you $$$$$.

Great product
Product performed exactly how I was told and got me out of two pinches already

Awesome
Love it help to know what wrong with my truck and can do a forced regan.

Once I got my new phone connected to it, it works absolutely wonderful.

Great tool
It performs as advertised. I've used it only once so far as I was able to determine the fault and fixed it! Great investment! To heck with the parts changing shops and dealers. $800 dollars vs the thousands paid because of the lack of troubleshooting skills? Absolutely worth the price.