Be one step ahead

Better prepared for your haul with OTR Diagnostics v2, making heavy-duty diagnostics clear and easy to understand.


OTR Diagnostics v2 is currently available for iOS only, Android is currently running v1. Android v2 coming soon.

Read/Clear Fault Codes

Fault code knowledge and enhanced fault code details allows for faster, more accurate repairs.

View Live Data

View boost pressure, DPF soot level, aftertreatment exhaust temperature and more in real time.

Dealer-Level Commands

Clear fault codes, reset aftertreatment system and perform a forced DPF regen anytime.


Built for owner-operators and beyond.

An advanced diagnostic application that performs vehicle commands over-the-road anywhere, anytime.

fault codes

Vehicle Fault Codes

OTR Diagnostics allows you to view fault codes directly from your mobile device. Make decisions that keeps your operation running smoothly in real time.

  • Enhanced Fault Code Details
  • Troubleshooting
  • Description
  • Fault Symptoms
  • Repair procedures
  • # of Times Occurred
  • Additional Information
live data

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
Remote commands

Send Commands

Clear fault codes simply select the reset fault codes function.

Reset engine learned data tap the Reset Aftertreatment command and three minutes later, done.

Forced DPF Regen, is now a tap away.

  • Reset Soot Levels
  • Reset 5mph Derates
  • Reset Ash Accumulators
  • Reset DPF Accumulators
  • Reset DPF Timers
  • Reset Engine Learned Data
  • Force DPF Regen 

How OTR Diagnostics Works

Set up in a few simple steps.


Step 1

Select Subscription Plan and 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

Multiple Makes / Engines

Includes subscription and adapters.

Pro Package

What are current users saying about OTR Diagnostics App

5-Star App Reviews

ex mechanic

Wow worked in the auto industry for 12 years, and this tool does what it says. Easy to use and works. Paid for itself in a month!! Cleared ghost codes. Also saved in repairs I did myself. Thank you OTR keep bringing out new and more features on this app!! Right to repair!!

Awesome Tool
Trucking Inside

I have used this tool to fix all my problems on my truck. Bought it. Soon as I got it hooked it up to my Volvo and Cummins Motor. The code were easy to read and understand. Replaced parts and no more codes.

OTR Does it again!

The layout of this app is easy to use and understand. I am very impressed by the functionality of this app.


Download the Instructions Manual

Download Manual

OTR Diagnostics FAQ

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

Which platforms Is OTR Diagnostics available for?

OTR Diagnostics works on iOS and Android mobile phones and tablets.

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.

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

Now Available!

Download Today!