AI Diesel Tech vs Davie4
PACCAR MX-13 Diagnostic Comparison
Davie4 is the OEM tool for PACCAR engines. AI Diesel Tech is the AI-powered diagnostic engine built for technicians who need fast, guided fault workflows without a laptop.
Davie4 runs OEM tests. AI Diesel Tech tells you what to test — and how to test it — step by step, right at the truck.
Try AI Diesel Tech FreeFeature Comparison
| Feature | AI Diesel Tech | Davie4 |
|---|---|---|
| Reads SPN/FMI fault codes | ||
| Displays fault descriptions | ||
| Step-by-step physical test guidance | ||
| AI-powered root cause analysis | ||
| Derate & inducement risk analysis | ||
| Mobile-first (no laptop required) | ||
| Works without hardware dongle | ||
| Aftertreatment diagnostic depth | Deep | Moderate |
| OEM bi-directional tests | ||
| Live data streaming | ||
| Requires Windows laptop | ||
| Hardware interface required | ||
| Free tier available |
Real-World Example: SPN 1239 FMI 13 — EGR Flow
How each tool handles an EGR flow fault on a PACCAR MX-13.
Davie4
- Runs EGR actuator tests
- Streams EGR flow data
AI Diesel Tech
- Explains EGR symptom patterns
- Guides physical checks step by step
- Helps isolate root cause — valve, cooler, or sensor
Where Davie4 Excels
- OEM-level PACCAR MX-11 / MX-13 access
- Bi-directional component tests
- Live data streaming from the ECM
- OEM calibrations and programming
Where AI Diesel Tech Leads
- Fast diagnosis at the truck without a laptop
- Step-by-step physical test guidance
- Real-world symptom interpretation
- Works on any smartphone — no hardware
- Free tier available
Davie4 vs AI Diesel Tech — FAQ
What is Davie4?
Davie4 is the OEM diagnostic software for PACCAR MX-11 and MX-13 engines used in Kenworth and Peterbilt trucks. It requires a Windows laptop and a hardware interface adapter. It reads fault codes, streams live data, and supports bi-directional tests specific to PACCAR engines.
Can I diagnose a PACCAR MX-13 engine without Davie4?
Yes. AI Diesel Tech supports PACCAR MX-11 and MX-13 SPN/FMI fault codes and provides step-by-step physical test guidance without Davie4, a hardware adapter, or a Windows laptop. Enter the fault codes and the AI generates a complete diagnostic workflow.
What is the difference between AI Diesel Tech and Davie4?
Davie4 runs OEM tests and streams live data from PACCAR engines. AI Diesel Tech generates step-by-step physical test sequences to isolate the root cause of a fault — no laptop, no hardware, works on any smartphone. The two tools serve different needs and can be used together.
Does AI Diesel Tech work with Kenworth and Peterbilt trucks?
Yes. AI Diesel Tech supports PACCAR MX-11 and MX-13 engines found in Kenworth T680, T880, Peterbilt 579, and 389 trucks. Enter the SPN/FMI fault codes from any scan tool and the AI generates a guided diagnostic procedure.
How much does Davie4 cost compared to AI Diesel Tech?
Davie4 requires a hardware interface adapter and is typically available through PACCAR dealer networks. AI Diesel Tech has a free tier and paid plans starting at $12.95/month with no hardware cost.
See the Difference for Yourself
Try AI Diesel Tech free — no hardware, no laptop, no friction. Works on any smartphone.