Speed change now available in OTR Remote Diagnostics for Detroit Diesel · Read more

Labor Day Sale · Save up to $100

Put downtime out of work.

Read the codes, clear the derate, and force the regen right from the cab. No shop, no tow, no waiting.

Free OTR Link 2 adapter included, a $299 value. Sale ends September 9.

$399Plans from $349/yearSave up to $100
Get OTR Diagnostics Compare all plans ↓
★★★★★ 600+ Google Reviews60-day money-back guarantee
OTR Link 2 adapter included with OTR Diagnostics

What you actually get

Dealer-level power, without the dealer wait

Diagnose the problem

Read real OEM fault codes and see what they mean before you spend a dollar.

Take action from the cab

Clear derates, reset codes, and force a regen on your schedule.

Stay equipped

OTR Link 2, OTR Assist, updates, cloud history, and Michigan support are included.

$6,000+ capability for $349/year Free $299 OTR Link 2 included · 60-day money-back guarantee

It never happens at a good time

One breakdown can cost more than a year of OTR

Handle the diagnosis and common recovery commands from the cab instead of waiting on a tow and an open dealer bay.

$1,200
a holiday-weekend tow
$2,000+
a lost load while you wait
$349
OTR Diagnostics for the whole year

Renews at $399/year. Cancel anytime.

When you're stuck, every minute costs money

Don't sit waiting for a shop to open

Read the problem, run the fix, and keep moving—even when the shops are closed.

1

Get out of the 5 MPH derate

Stuck in the 5 MPH inducement derate, crawling in limp mode with a load on the line? Run the command yourself and get rolling again. Volvo, Mack, Cummins, and PACCAR clear the 5 MPH derate; Detroit Diesel clears it through a forced DPF and SCR-efficiency regen.

2

Clear ghost codes

Clear ghost codes, the stubborn, intermittent codes that keep coming back or won't clear, so a nuisance light stops turning into a shop visit.

3

Force a regen

Start a forced DPF regen on your schedule instead of chasing a shop, across every engine we cover, plus a forced SCR regen on Volvo and Mack.

4

Read and clear fault codes

Real OEM codes, not generic guesses. Know exactly what is wrong before you spend a dollar.

5

Live data and history

Watch sensors live and keep a record of every code and command on the truck.

Dealer-level bi-directional commands in the OTR Diagnostics app

Labor Day Sale pricing

One truck or a small fleet, pick your plan

Single Truck Pro

One truck. The owner-operator.

Save $50
$349$399/year
  • Locked to one truck VIN
  • Read codes, clear derates, and force regens
  • OTR Link 2, OTR Assist, updates, and support included

Renews at $399/yr. Cancel anytime.

Get Single Truck Pro
Most popular
Unlimited Pro

Every truck in a small fleet, on one plan.

Save $75
$524$599/year
  • Unlimited truck VINs
  • Full diagnostic and recovery commands
  • OTR Link 2, OTR Assist, updates, and support included

Renews at $599/yr. Cancel anytime.

Get Unlimited Pro
Unlimited Pro 2-Year

Unlimited trucks, locked two years. The deepest savings.

Save $100
$699$799
  • Unlimited VINs for two years
  • The lowest annual cost of any plan
  • OTR Link 2, OTR Assist, updates, and support included

Renews at $799. Cancel anytime.

Get the 2-Year Plan

Every plan includes the $299 OTR Link 2 adapter and a 60-day money-back guarantee.

OTR Link 2 OTR Assist AI Cloud history Michigan support

Works with your trucks

Full support for major diesel engines through the 2026 model year

Coverage spans major Cummins, Detroit Diesel, PACCAR, Volvo, Mack, and International engines from 2008 through 2026. Select your exact truck to confirm compatibility and available commands.

Vehicle compatibility

Will OTR Diagnostics work with your truck?

Select your truck and engine to see compatibility, supported diagnostics and available commands.

Command coverage varies by engine and model year. Confirm your exact truck before buying.

★★★★★  600+ Google Reviews

Drivers who keep rolling instead of sitting stuck

More than 10,000 owner-operators and fleets run OTR Diagnostics across thousands of fleets.

★★★★★

Already saved me a $5,000 to $6,000 tow bill.

Avoided a major tow
WJ

William J. · Verified buyer

★★★★★

It has saved us on the road from being towed or overcharged by the dealership.

Stayed on the road
MR

Matteo R. · Verified buyer

★★★★★

It has gotten me out of several derates. The forced regen and live data are 10/10.

Cleared multiple derates
CG

Chris G. · Verified buyer

10,000+ owner-operators and fleets600+ Google ReviewsMade in Detroit60-day money-back

Take control

Your downtime, on your terms.

Read the codes, clear the derate, and decide what happens next—on your schedule.

Do I need to be a mechanic?+
No. Plug in the OTR Link 2 and the app reads your truck in plain English: the real codes, what they mean, and what to do next. If you can use a phone, you can use OTR.
Will it work on my truck?+
It covers Cummins, Detroit Diesel, Volvo, Mack, and Paccar. Check your engine and year so you know it works before you buy.
Why not just use a shop?+
A shop runs on their schedule, their price, and a bay booked days out. OTR puts it in your hands: see the codes, clear the derate, force the regen, on your time. Stop losing loads waiting on someone else.
What if it's not for me?+
You've got 60 days, money-back. Put it on your truck, and if it's not for you, get a full refund.
What do I get, and does it renew?+
The OTR Diagnostics app plus the OTR Link 2 Bluetooth adapter ($299, free during the Labor Day Sale). First-year Labor Day Sale price, renews at the regular annual rate, cancel anytime.
Do other drivers trust it?+
More than 10,000 owner-operators and fleets run OTR Diagnostics, with 600+ Google reviews.

Labor Day Sale · Ends September 9

Get equipped before the next derate

$349
$399
Single Truck
$524
$599
Unlimited
$699
$799
2-Year
Get OTR Diagnostics See all plans

Free OTR Link 2 adapter, a $299 value · 60-day money-back · Renews at full price. Cancel anytime.