Make Cars Talk


Thanks to its device and its mobile application, CarDiag allows motorists to diagnose their vehicle (breakdowns, wear of components, pollution and driving score) by themselves, with very low costs.

CarDiag is compatible with all makes of vehicles :
– Gasoline since 2001
– Diesel since 2004
– Utility since 2007

A simple, intuitive and 100% free application


  • A simple and easy-to-use mobile application that allows drivers (individuals and professionals) to diagnose their vehicles (breakdowns, wear of components, pollution and driving score) without any special knowledge. Detect faults and turn off the engine light etc.
  • A 100% free, intuitive and multi-brand application. No “lite” version or “paid” options.


A secure and ultra accessible device


  • Voluntarily placed at the best price. The CarDiag device is certified and guaranteed for 2 years.
  • No risk for vehicles and their manufacturer’s guarantees, a complete user manual, helpers at your disposal and a responsive after-sales service.
  • Easily connect your vehicle using the CarDiag device, and access the health status of your car.
  • With CarDiag, diagnosing your car becomes child’s play.
CarDiag scanner

CarDiag features


Monitor the health of your vehicle

  • Connected using an OBD device, the CarDiag application diagnoses your vehicle and alerts you. It visualizes the detected faults and gives a detailed description for each fault and its origin in simple and easy-to-understand terms.


Turn off the engine light

  • Turn off the malfunction indicator lamp (MIL) when it’s not associated to a real failure.

Reduce your fuel consumption

  • The driving scores are calculated by algorithms based on several criteria: energy efficiency, hard braking and rapid acceleration. This analysis allows you to improve your driving and thus reduce your fuel consumption and CO2 emissions.


View real-time vehicle data

  • In order to optimize your driving, reduce your fuel consumption, and reduce your carbon footprint, CarDiag displays vehicle usage data in real time, useful for better understanding your car’s needs (eg temperature, pressure, fuel, etc. .)

Manual Diagnostic

  • Cardiag provides assistance for a direct diagnosis by the user (visual defects, noise, smells, etc.)


Routine vehicle maintenance

  • Perform a regular vehicle check-up, pre-vehicle inspection or before buying a car.

Simplest repair tutorials

  • Cardiag allows independent repair (Do-it-yourself – DIY) of the most common problems through tutorials and tips on purchasing auto parts.


Car repair at the nearest mechanic

  • Find the car repair cost estimation at the nearest mechanic.

Maintenance Book

  • Digitize and store all repairs made by the user or a professional with attached invoices.


Key figures






Compatible Makes

Most frequently asked questions

Engine light, what does it mean ?

The engine light or MIL (Malfunction Indicator Lamp) is a light on the dashboard of cars which indicates that a malfunction has been detected in the engine or the emission control system.

  • The check engine light flashing : the engine should be stopped as soon as possible as there is a risk of engine damage. The computer will switch the engine to “degraded” mode, limiting the engine speed to 3000 rpm for a petrol engine and 2000 rpm for a diesel engine.
  • The check light appears and disappears : this occurs if the fault is not detected for the next three consecutive cycles (1 cycle = starting + running + engine shutdown).
  • Engine light on : the check engine light remains on until the detected fault has been removed from the engine control unit. An electronic diagnosis then makes it possible to consult the fault code and helps to establish a diagnosis with a view to possible repair. Then the fault code can be cleared with the diagnostic tool.

What is a fault code ?

Diagnostic Trouble Codes or OBD2 Trouble Codes are codes that the car’s OBD system uses to notify you about an issue. … A vehicle stores the trouble code in it’s memory when it detects a component or system that’s not operating within acceptable limits. The code will help you to identify and fix the issue within the car

Can I turn off the engine light with Cardiag ?

Yes, the Cardiag application will allow you to turn off the engine light on your dashboard.

Can I clear faults with Cardiag ?

Yes, the Cardiag application will allow you to read and erase the engine faults detected on your vehicle.

Can I clear the maintenance indicators with Cardiag ?

No, it is impossible to clear the maintenance indicators. This operation is specific depending on the manufacturers. Only specific tools allow you to do this.

Can I clear ABS, Airbag or ESP faults with the Cardiag app ?

No, Cardiag can only diagnose engine and transmission faults. In the case of an ABS, Airbag or ESP warning lights, only a manufacturer’s suitcase is capable of making a diagnostic.

Do I need technical skills to be able to use CarDiag ?

No, the CarDiag solution is dedicated to everyone.

What is an OBD scan tool ?

Auto technicians and owners use an OBD scanner device to understand the data the system gathers. It can provide data about your car’s air temperature, coolant, crankshaft and camshaft, position, road speed, and throttle as well as engine RPM…

Where’s my OBD port ?

The OBD port is usually located under the dashboard, beneath the steering wheel column. this website allows you to find the OBD port in your car.

Is my car OBD compatible ?

All vehicles manufactured or imported are OBD compatible :

  • In the United States since 1996
  • In Europe
    • Gasoline since 2001
    • Diesel since 2003
    • LPG since 2001

Which OBD scanner is compatible with the Cardiag app ?

  • All OBD bluetooth scanner tools are compatible with the Cardiag Android app.
  • All OBD WiFi scanner tools are compatible with the Cardiag iOS app.

Can I leave the OBD scanner tool permanently connected to my car ?

We do not recommend that you leave the scanner permanently connected to your car, as it may drain your battery.

More than 1,000.000 diagnostics done using the CarDiag solution

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