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 Cummins dealer-level commands. No tow. No diagnostic fee. No two-day appointment.
- Reset a derate
- Forced DPF regen
- Read & reset fault codes
- SCR performance test
- Aftertreatment filter install
- 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 a derate from the driver's seat Command: Reset Aftertreatment Avoids on average $1,300 tow
A 5-MPH SCR derate is the most expensive fault a Cummins throws — not because of the part, but because you can't get to the shop without a hook. Reset the derate from the cab, restore full power, and drive to the fix on your terms.
2 Burn off soot yourself Command: Forced DPF Regen Replaces a $300 shop regen
When soot loads up 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 Cummins 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: SCR Performance Test Prevents the next $2,000 surprise
The SCR system fails slowly, then derates you suddenly. Run the same performance test the dealer runs and catch a dying NOx sensor or DEF issue weeks before it becomes an inducement on a load.
5 Install your own aftertreatment filter Command: Aftertreatment Maintenance Filter Installation Ends the dealer-only visit
Swapping the DPF at a maintenance interval is a bolt job — but the ECM needs to be told it happened, and dealers charge a visit for that handshake. Do the install, run the command, 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 4364 shows on an X15, 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.
- Cummins-specific depth. X15, X12, ISX, ISC 8.3, ISL 9 and ISB 6.7 — 2008 to 2024, including the aftertreatment-era engines that generate most of the pain.
The gauges Cummins didn't put on your dash.
Proof from the people paying the bills.
"X15 threw an SCR derate 400 miles from home. Reset it from the cab, delivered, and fixed the NOx sensor in my own driveway for $40. The dealer quoted $1,900 and a Thursday."
"I run three ISX trucks. Between regens and code-reads alone this pays for itself every quarter — the shop was getting $300 every time a soot light came on."
"Had a 5 MPH derate in the middle of Nebraska at 11pm. Twenty minutes with my phone and I was rolling again. A tow out there is $1,300 minimum."
"The SCR performance test caught a bad DEF dosing unit before it ever put me in derate. Fixed it on a Saturday at home instead of losing a Tuesday load."
"I'm 61 and not a computer guy. Plugged it in, app found my ISB, and it told me in plain English what the code meant. Took five minutes."
"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 Cummins is covered.
The next derate doesn't have to cost $2,800.
Every plan includes the OTR Link 2 adapter free ($299 value), all Cummins commands above, OTR Assist AI, live data, and US-based support from Detroit.