Get FREE hardware ($200 value) with any OTR Diagnostics package! Details

OTR Diagnostics | Detroit Diesel
OTR Diagnostics | Detroit Diesel
OTR Diagnostics | Detroit Diesel
OTR Diagnostics | Detroit Diesel
OTR Diagnostics | Detroit Diesel
OTR Diagnostics | Detroit Diesel
OTR Diagnostics | Detroit Diesel
OTR Diagnostics | Detroit Diesel
OTR Diagnostics | Detroit Diesel
8 reviews

OTR Diagnostics | Detroit Diesel

Regular price $800 USD $600 USD
Unit price  per 

Price includes:

one time purchase hardware

12-month auto renew subscription

Packages include all needed hardware and first year subscription.

Subscription automatically renews after one year unless canceled (cancel at any time).

Works on iOS and Android.

Comes with a 60-day money-back guarantee.

Coverage App Features
OTR Diagnostics redesigned layout helps you run advanced diagnostic functions, including a forced DPF regen from your mobile device easier than ever before.
diagnostics banner
Chassis Coverage
  • Freightliner Trucks — All Models
  • Western Star 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
detroit diesel in the box
Instructions Manual
Detroit Diesel Commands

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
  • GHG14 (2014-2016)
    • Reset Fault Codes
    • Reset Ash Accumulator
    • Reset SCR Accumulator
    • Start Forced DPF Regen
  • GHG17 (2017-2021)
    • Reset Fault Codes
    • Reset Ash Accumulator
    • Reset SCR Accumulator
    • Start Forced DPF Regen

NOTE: OTR Diagnostics is not compatible with the OTR Reset Tool.

Engine Emission
DD60 EPA07 (DPF Only)
DD13  EPA07 (DPF Only)
DD15  EPA07 (DPF Only)
DD60  EPA10 (DPF + DEF)
DD13  EPA10 (DPF + DEF)
DD15  EPA10 (DPF + DEF)
DD16  EPA10 (DPF + DEF)
DD13  GHG14 (DPF + DEF)
DD15  GHG14 (DPF + DEF)
DD16  GHG14 (DPF + DEF)

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



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.

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

OTR Diagnostics FAQ

How does the subscription work? 

Subscriptions are based on a 12 month 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

  • 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!

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.

  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.
Customer Reviews
4.9 Based on 8 Reviews
5 ★
4 ★
3 ★
2 ★
1 ★
Customer Photos
100reviewers would recommend this product Write a Review Ask a Question

Thank you for submitting a review!

Your input is very much appreciated. Share it with your friends so they can enjoy it too!

Filter Reviews:
Nicole J.
United States
I recommend this product

OTR Diagnostic

Great product and responsive customer and tech support

10/08/2021 Ramos
United States United States
I recommend this product

Owneer operador from the port of LongBeach & L.A.

Great!!! The first time I got check engine light cost me $1500 plus 3 nights at motel 6. Second time I was in LongBeach cost me $1800. Now with this thing, I just pull over and DONE in lees then 1 hour. I do recommended!!! Luis ramos.

OTR Performance® Inc. OTR Diagnostics | Detroit Diesel Review
Brian A.

2017 Freightliner a cascadia DD15

The diagnostic software has worked great for me so far. I have cleared a few codes, and forced a regeneration. Once a week or so I will hook up and use the live data to check the health of the truck. Tool seems very easy to use and a quality product so far

Ricardo C.


It does what it was made to do, I'm happy to have it, it help me out quite a few times out on the road, I recommend it to you, you don't know when you might have an issue that you can help yourself with and make it to a safe populated area to get help if needed. OTR

Mikaeel S.

A must have tool for

A must have tool for every owner/operator. Saves tome amd money from having to wait on the side of the road for a mobile mechanic or trying to get to a truck repair shop or dealership to get diagnostics and hefty bills for After-Treatment related issues.

Jwb@Loadituplogistics.Net B.

Awesome tool!! had to use

Awesome tool!! had to use it one time to force a reset. It saved me money by not having to call a someone to come out to me to. We all know how much that could've costed!!

Ronal F.


Easy to use tells you what’s the code is what’s the problem save me a lot money not going to a truck stop paying 150 just to have the same information that the OTR will give you I’ll recommend to every trucker out there.

Sean H.

This tool just made owning

This tool just made owning a emission truck a little less STRESSFUL! It saved me big money on repairs I made myself that a shop would've burned me up on. I'm spreading the word about this product to all the owner operators I know.

OTR Performance® Inc. OTR Diagnostics | Detroit Diesel Review