OTR Diagnostics

OTR Diagnostics — Trusted by 10,000+ Truck Owners

Dealing with regen problems, nonstop alerts, fault codes, and unexpected derates on your heavy duty truck? You are not alone. More than 10,000 truck owners and fleets trust OTR Diagnostics to take control, cut downtime, and avoid expensive dealer visits.

Powered by OTR Assist + OTR LINK 2

This is more than a scan tool. OTR Assist is your AI partner, breaking down fault codes in plain language and helping you troubleshoot and decide if you can keep driving or need service now. Paired with OTR LINK 2, our proprietary Bluetooth adapter, you get faster connection speeds, more accurate fault code data, and more live data parameters than ever before. It is 5X better than previous hardware. Ask us how to get a FREE upgrade today.

Commands That Keep You Moving

With bi-directional commands built right into OTR Diagnostics, you are no longer stuck waiting on a shop to do what you can handle yourself.

Reset active and inactive fault codes

Reset the entire aftertreatment system

Reset derates that slow you down

Reset soot levels after a DPF service

Run forced DPF or SCR regens right from the cab

These commands put you back in control, saving you time, money, and downtime.

Fault Code Insights

Go beyond a flashing dash light. OTR Diagnostics helps you understand fault codes with the same level of detail as dealer software, but in plain language you can actually use.

Decode your dash lights

Uncover the root causes of issues

Track how often a problem occurs

Know which repairs or parts are needed

Live Data Monitoring

Want to know if your regen is working? Want to monitor exhaust temps, soot levels, or DEF? OTR Diagnostics lets you see your truck’s vitals in real time so you can spot issues before they stop you.

Common live data parameters include:

DPF fluid level

DPF soot level

EGR valve position

Aftertreatment exhaust temps

Boost pressure

Accelerator pedal position

Engine fuel delivery pressure

Available live data may vary depending on the engine model your device is connected to.

Explore Your History

Recurring problems? OTR Diagnostics logs every fault code and command so you can see when issues happened, when they were cleared, and how long regens lasted.

Proven. Tested. Backed by Support

We run OTR Diagnostics, OTR Assist, and OTR LINK 2 on our own fleet of test trucks including late model Paccar MX engines to make sure everything works before it reaches you. That is why more than 10,000 drivers already trust OTR Diagnostics.

Made in Michigan. Built for You

We engineer, assemble, and ship right from our shop in Macomb, MI. If you are nearby, stop in and see us.

Coverage

We support a wide range of heavy duty engines:

Cummins: CM871, CM2150, CM2250, CM2350 (2008–2024)

Detroit Diesel: DD60, MBE, DD13, DD15, DD16 (2008–2024)

Paccar: MX11, MX13 (2011–2024), PX7, PX9 (2008–2024)

Volvo: D11, D13, D13TC, D16 (2014–2024)

Mack: MP7, MP8, MP8HE, MP10 (2014–2024)

For the full list of compatible models, call or text us at 586-799-4375.

Need Help or Have Questions?

Call or text us anytime at 586-799-4375 or email support@otrperformance.com.