CarDiag24AI-powered vehicle guidance, available through Telegram.

How it works

How CarDiag24 works

Get clear explanations for warning lights, fault codes and car problems. Send a message or photo directly in Telegram and receive AI-powered diagnostic guidance.

  1. 01

    Open the bot

    Start a conversation with the official CarDiag24 Telegram bot.

  2. 02

    Describe the issue

    Share an OBD-II code, symptoms, vehicle details, or a supported photo.

  3. 03

    Review guidance

    Get possible causes and sensible next checks, then use a qualified mechanic when needed.

Illustrative example — not a real customer diagnosis.

CarDiag24Botbot
Illustrative example — not a real customer diagnosis.
P0420 9:41
P0420 — Catalyst System Efficiency Below Threshold

This code can mean the catalytic converter system is not performing as expected. The code alone does not identify a failed part.

Possible causes:
  • Exhaust leak
  • Oxygen sensor or wiring issue
  • Catalyst wear or damage
  • Engine mixture or misfire problem
Recommended next checks:
  1. Read related codes and freeze-frame data
  2. Inspect exhaust leaks and sensor wiring
  3. Check fuel trims and misfire data
  4. Test catalyst efficiency before replacing parts
AI guidance is informational and does not replace inspection or repair by a qualified professional.
⌕ Message ➤

Illustrative example — not a real customer diagnosis.

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Safety comes first

If the oil-pressure or brake warning is on, the engine is overheating, the warning light is flashing, or you notice smoke, fuel smell, loss of steering or braking, stop in a safe place and seek professional or roadside help. Do not rely on AI to decide whether a vehicle is safe to drive.