As a car mechanic and shop owner, I got tired of answering

the same diagnostic questions over and over. "Why is my

Check Engine light on?" "Why does my car shake at 60 mph?"

"Why won't it start in the cold?"

So I built an AI-powered diagnostic tool for my auto service

website. It's a conversational chatbot that asks follow-up

questions, analyzes symptoms, and gives users a preliminary

diagnosis — all before they even call the shop.

How it works

The bot (I named him "Paweł") uses an LLM to:

Accept a free-text description of the problem

Ask targeted follow-up questions

Suggest likely causes ranked by probability

Recommend next steps (DIY fix or visit a mechanic)

What surprised me

Users describe problems much better when talking to a "mechanic" than filling out a form

The AI catches patterns humans miss (e.g.…