AI-powered truck diagnostics

Type the symptom.
Get the diagnosis.

AI engine diagnostics for commercial trucks. Enter fault codes or describe what's happening. No hardware. No dealer. Instant answers.

faultpilot diagnosis
Truck
2021 Kenworth T680 · PACCAR MX-13
Symptoms
Losing power on grades, check engine light, white smoke at idle
Diagnosis
DEF Quality Sensor Fault (SPN 4364 / FMI 18)
Diesel Exhaust Fluid concentration reading out of range. Common on 2019-2022 MX-13. Likely causes: contaminated DEF tank, failed quality sensor, or DEF crystallization in the injector nozzle. Check DEF age first. Estimated repair: $280-$650.
Every major over-the-road brand
Kenworth
Peterbilt
Freightliner
International
Volvo
Mack
Isuzu
How it works

Three inputs. One diagnosis. Zero hardware.

01

Enter your truck

Select your make, model year, and engine. FaultPilot knows every engine platform across all 7 major brands.

02

Describe what's wrong

Type symptoms in plain English, enter fault codes, or both. "Truck derated on the highway" works just as well as "SPN 3251 FMI 0".

03

Get actionable answers

AI cross-references your symptoms with fault code databases, TSBs, and known failure patterns. You get the diagnosis, likely cause, and estimated repair cost.

Why FaultPilot
$0

No hardware required

Every other diagnostic tool needs a $300-$5,000 adapter. FaultPilot works from your phone. That's it.

7

All brands, one tool

Kenworth, Peterbilt, Freightliner, International, Volvo, Mack, Isuzu. Stop paying per-brand for diagnostic coverage.

24/7

Roadside answers

Break down at 2am in rural Kansas? FaultPilot doesn't close. Get a diagnosis before you call the tow truck.

Plain English

Built for drivers

You don't need to be an ASE-certified diesel tech. Describe what's happening the way you'd tell a mechanic. FaultPilot understands.

Stop guessing. Start diagnosing.

Every hour of downtime costs money. FaultPilot puts a diesel mechanic's brain in your pocket, available the second something goes wrong.