OTR Diagnostics | Professional
OTR Diagnostics | Professional
OTR Diagnostics | Professional
OTR Diagnostics | Professional
OTR Diagnostics | Professional
OTR Diagnostics | Professional
OTR Diagnostics | Professional
OTR Diagnostics | Professional

OTR Diagnostics | Professional

Regular price $300.00
Unit price  per 

hardware only

Pro Plan - $1600/yr

Android NOT Available Yet - Get Notified

Diagnostics Like Never Before

OTR Diagnostics, the most powerful advanced mobile diagnostics app available for iOS. Those days of lugging around big equipment to perform advanced diagnostics are over. You don’t need complicated software or multiple programs – all you need is your vehicle, a phone, and an adapter.

OTR Diagnostics gives you the power to run advanced diagnostic functions, including a forced DPF regen from your mobile device.

OTR Diagnostics is an advanced automated diagnostic app that makes it quick and easy to understand what’s taken your truck off the road. 

You’ll have the power to clear fault codes, reset the aftertreatment system by reprogramming all the parameters to default values, and if necessary, perform a forced DPF regen of the DPF. Anywhere, anytime.

Who’s OTR Diagnostics for?

OTR Diagnostics is for fleet owners, owner-operators, drivers, and technicians who are tired of paying every month for check engine lights, regens, and resets. 

With OTR Diagnostics, you’ll instantly be able to:

  • Cut down on the days your vehicles spend in repair shops
  • Get a deeper insight into your engine’s performance and each rig’s unique quirks
  • Drive confidently at night or out of state with less worrying about getting stuck

If you’ve ever lost a day (or a load) due to breakdowns, engine faults, soot level, or mysterious, un-re-creatable ghost codes, you need OTR Diagnostics.

otr diagnostics

Download Today!



*Available with Plus and Pro Subscription.

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 27 FMI 3
    EGR valve position sensor circuit
    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.


*Available with Plus and Pro Subscription.

Fault code history and command history

Quickly reference recent fault codes, how often they occur, and date stamp when it first occurs.

View commands with status history for how long forced DPF regen lasted, clearing fault codes, and reset aftertreatment status.

live data
Display Parameters

OTR Diagnostics allows you to view live parameters making sure you are informed of how your vehicle is doing.

  • 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


Set up in a few simple steps.

Step 1

Select Subscription Plan, Diagnostic Adapter, and Harness


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

NOTE: OTR Diagnostics will not work with the OTR Reset Tool.
Chassis Coverage
  • Volvo Trucks – All Model
  • Mack – All Models
  • Freightliner - All Models
  • Western Star - All Models
  • Peterbilt - All Models 
  • Kenworth - All Models 
  • Sterling - All Models
  • International - All Models - (Cummins only)
Coverage Years: 2007-2020
  • Volvo Engines 2014+ 
  • Mack Engines
  • Cummins Engines
  • Detroit Diesel Engines
  • Paccar MX and PX Engines
What comes with the package?
  • OTR Diagnostics App Download
  • OTR Diagnostics Yearly Subscription
  • Nexiq BlueLink - Mini Adapter
  • OTR Crossover Adapter
  • OTR Diagnostics Harness
  • Instructions Manual
pro in the box

Meet Jack Mancini

Customer Review

Voice of our customers.

How to

2018 Freightliner Cascadia Detroit Diesel DD15

Initiating a forced DPF regen with the OTR Diagnostics app.




  • Unlimited Vehicles
  • Read Inactive Fault Codes
  • Read Active Fault Codes
  • Clear Active Fault Codes
  • Clear Emission Derates
  • Start Forced DPF Regen
  • Offline Mode
  • Fault Code History
  • Commands History
  • Enhanced Fault Code Description
  • Live Data
  • Enhanced Adapter List

FAQ about OTR Diagnostics

How does the subscription work? 
Subscriptions are based on a per yearly basis.

Does this App need to be online to be used?
OTR Diagnostics is Bluetooth based and does require you to have Wifi or cellular coverage for you to be able to use the app.

I currently have a compatible Bluetooth Adapter. How can I purchase only a subscription?
Stand-alone OTR Diagnostics subscriptions are available by contacting us - Contact us today!

If I have an existing OTR Performance account, how do I link my OTR Diagnostics subscription to the account?
When purchasing a subscription, you must use the same email on your existing account when you are on the checkout page. Then it will automatically link your subscription to your existing account. If you are having problems managing your subscriptions, click here

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 an 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.

Create an 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 the mobile "OTR Diagnostics" Application

Is OTR Diagnostics available only for Apple iOS mobile phones and tablets?
Yes, at the moment OTR Diagnostics only works on iOS mobile phones and tablets.

30-Day Guarantee

We get it, you don’t know us very well yet. That’s why OTR Diagnostics comes with a 30-day, no-hassle, money-back guarantee. If this doesn’t fit your needs for any reason, just let us know within 30 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. No bouncing. Real help from real people, when you need us! Contact us via phone, chat, or email anytime.

  1. 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.
  2. Phone and/or tablet not included.
  3. App features differ depending on the subscription plan.