Klaro: OBD2 Car Scanner

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In-app purchases

About this app

Klaro turns the check engine light into a clear explanation.

Plug an OBD2 adapter into the diagnostic socket under your dashboard, and Klaro reads what the engine computer has stored. You finally know what is wrong, in plain words, without workshop jargon.

WHAT KLARO DOES

• Reads confirmed and pending fault codes
• Explains every code in plain language, with how urgent it is
• Clears the codes and turns the light off, once the fault is fixed
• Shows live engine data: revs, speed, temperatures, pressures, oxygen sensors and over a hundred other readings
• Builds your own dashboard: pick your tiles, reorder them with a long press
• Keeps your scan history on the phone, readable with no adapter plugged in
• Recognises your vehicle by its VIN and remembers the name you gave it

TRANSLATED PROPERLY

All 774 standard generic codes are translated into English, French, Spanish, German and Portuguese. Manufacturer-specific codes keep their original wording: their meaning depends on the make and the ECU software version, and an invented translation would mislead rather than help.

WHAT YOU NEED

An ELM327 OBD2 adapter, Wi-Fi or Bluetooth. It is not included with the app.

Your vehicle must be OBD2 compliant: that covers petrol cars sold in Europe since 2001 and diesel since 2004, and cars sold in the US since 1996.

WORKS WITHOUT INTERNET

No account, no sign-up. Every explanation ships inside the app, which matters: once connected to a Wi-Fi adapter, your phone has no network access left.

KLARO PRO

Reading codes and live data are free, with no ads. Clearing codes is part of Klaro Pro, a one-time purchase, no subscription.

AN HONEST WARNING

Clearing a code turns the light off but repairs nothing. If the fault is still there, the code comes back. Emission monitors are also reset: expect several dozen miles before an inspection.