CarDiag24AI-powered vehicle guidance, available through Telegram.

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Understand Your Car Problems with AI 24/7

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.

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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.

CarDiag24

Clear guidance for the next step

Understand the information you already have and decide what to check next.

Fault-code explanations

Plain-language context for OBD-II codes and likely diagnostic directions.

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CarDiag24

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Website subscriptions renew monthly until canceled. Telegram Stars purchases are separate.

Credits reset when a new paid 30-day period starts; unused credits do not roll over. There is no free diagnostic plan.

Photo diagnostics are available with Pro when enabled for your account in the bot.

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How it works

How CarDiag24 works

  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.

How it works →

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.

Frequently asked questions

Does CarDiag24 replace a mechanic?

No. It provides informational guidance and cannot inspect a vehicle or confirm a diagnosis.

Can I send a photo?

Photo diagnostics are included with the Pro package, when available in the bot.

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