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DERATE: Truck Fault Codes

Read the code. Keep driving.
VARGER GROUP LLC · Utilities
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App info

Developer
VARGER GROUP LLC
Category
Utilities, Business
Released
Sep 24, 2026
Version
2.0.1 (Oct 23, 2026)
Price
Free
Size
72.9 MB
Requires
iOS 16.4
Age rating
4+
Languages
English and Spanish

In-app purchases

Rescue - 1 Diagnosis$19.99
Driver - Weekly$8.99
Driver - Monthly$19.99
Shop - Monthly$99.00
Shop - Yearly$990.00
Current prices, App Store US.
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About DERATE: Truck Fault Codes

DERATE turns a photo of your dashboard — or of the shop's scanner screen — into a straight answer. Point the camera at the warning lights or at the code on the screen. DERATE reads it and tells you: • What the code actually means, in plain language • Whether you can keep driving, and how long before the engine derates • The most likely root cause • The checks to run, in the order that saves the most time • A work order you can hand to the shop Works with SPN/FMI codes and OEM codes from Cummins, Freightliner, Paccar, Volvo, International and Detroit. BUILT FOR THE ROADSIDE Big type, high contrast, readable in direct sunlight with gloves on. Bilingual — English and Spanish, switched from Settings or detected from your phone. WHO IT IS FOR Owner-operators and drivers who need to know right now whether the load still moves. Shops that want the diagnosis and the work order before the truck…
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