Turn a $2,000 derate day
into a 20-minute fix.
Read the fault, run the fix and clear the derate yourself — from the cab, on your phone, with Detroit dealer-level commands. No tow. No diagnostic fee. No two-day appointment.
- Reset fault codes
- Forced DPF regen
- Reset ash accumulator
- Reset SCR accumulator
- Forced SCR efficiency regen
- OTR Assist AI
- Live data monitoring
Replace a bill you've already paid before.
These aren't features — they're invoices you stop receiving. Average costs below are what members report paying shops and dealers before switching.
1 Clear an SCR inducement from the driver's seat Command: Reset SCR Accumulator Avoids on average $1,300 tow
An SCR inducement is the most expensive fault a Detroit throws — not because of the part, but because a 5-MPH derate means you can't get to the shop without a hook. Fix the cause, reset the accumulator from the cab, and drive to the repair on your terms.
2 Burn off soot yourself Command: Forced DPF Regen Replaces a $300 shop regen
When soot loads up on a DD13 or DD15 and a passive regen won't cut it, the shop charges ~$300 and half your day to do what your engine can do parked. Run a forced regen in 30–45 minutes while you eat lunch.
3 Read & reset faults before anyone charges you Command: Reset Fault Codes Skips the $400 diagnostic fee
Shops charge ~$400 on average just to plug in and tell you what you could see yourself. Read the fault, see what it means in plain English, clear it after the fix — and only pay a shop when there's actual wrench work.
4 Test your SCR before it derates you Command: Forced SCR Efficiency Regen Prevents the next $2,000 surprise
Detroit's SCR system fails slowly, then derates you suddenly. Run the same efficiency regen the dealer runs and catch a dying NOx sensor or DEF quality issue weeks before it becomes an inducement on a load.
5 Close out your own DPF service Command: Reset Ash Accumulator Ends the dealer-only visit
Cleaning or replacing the DPF at a service interval is a bolt job — but the ECM keeps counting ash until someone tells it otherwise, and dealers charge a visit for that handshake. Do the service, reset the accumulator, done.
One derate. Two ways it can go.
Without OTR Diagnostics
With OTR Diagnostics
We've logged 22 million fault codes. Yours won't surprise us.
- Pattern-backed answers. When SPN 5246 shows on a DD15, OTR Assist AI draws on the thousands of times our members have already hit it — what caused it, what fixed it, what it cost.
- 1,000,000+ commands sent, 100,000+ regens run. Every forced regen and derate reset sharpens the guidance for the next driver. A code reader shows you a number; OTR shows you what 10,500 members did about it.
- Detroit-specific depth. DD5, DD8, DD13, DD15 and DD16 — 2008 to 2024, including the aftertreatment-era engines that generate most of the pain.
The gauges Detroit didn't put on your dash.
Proof from the people paying the bills.
"This product paid for itself on the first use. Easy to use and understand."
"Great customer service, and the diagnostic subscription is gonna save you money."
"DD15 went into a 5 MPH derate outside Amarillo at 10pm. Cleared the inducement from the cab and delivered on time. A tow out there is $1,300 minimum."
"Had the DPF cleaned myself and just needed the ash accumulator reset. That used to mean a dealer appointment for a two-minute job."
"I'm 61 and not a computer guy. Plugged it in, the app found my DD13, and it told me in plain English what the code meant."
"Stopped paying $400 every time a light came on just to be told it was nothing. I check it myself now and only go to the shop when there's real work."
Your Detroit is covered.
The next derate doesn't have to cost $2,800.
Every plan includes the OTR Link 2 adapter free ($299 value), all Detroit commands above, OTR Assist AI, live data, and US-based support from Detroit.