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Identifying Exhaust Smoke

Curious what blue, black or white smoke on your truck means?

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Meet OTR Diagnostics - the modern semi-truck scan tool & more

When the check engine light turns on, it's not just a simple warning. It's a signal that something is going on with your truck.

With OTR Diagnostics, you don't just see the codes; you learn what they really mean. This helps you fix problems quickly and gets your truck back on the road.

✔️ Unlock detailed explanations of each fault code.

✔️ Understand not just the code, but the specific issue and suggested fixes.

✔️ Empower yourself to perform your own repairs with guided diagnostics and easy-to-follow repair suggestions tailored to your truck's specific needs.

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500+ Google Reviews

Customers love OTR Diagnostics — read why 98% of OTR customers would recommend OTR Diagnostics.

I would recommend this diagnostic tool to any truck driver out there.

— K O311 - Google Review

One of the best apps to keep track of your aftertreatment.

— Michael Erb - Google review

In my opinion this is a must have for any small operation

— Manny Choate - Google Review

I recommend every truck owner / fleet / mechanic should have this device

— Bill Chohan - Google Review

Start taking ownership of your truck diagnostics

Get access to detailed fault code information, monitor real-time live data, perform commands like initiating forced DPF regeneration and track command and fault code history, all from your mobile device.

Pricing

OTR Diagnostics

Features

Real time live data

Access live data parameters from your engine and aftertreatment systems to troubleshoot.

Learn about Live data

Bi-directional commands

Perform dealer level commands, reset fault codes, reset derates, forced DPF regen, & more.

Learn about Commands

View history

All of the truck information is stored in the cloud, making it easy to get access to this information.

Learn about History

OTR Diagnostics hardware

We break down the hardware that comes with your OTR Diagnostics purchase.

See what's Included