Your first read: understanding the result and what to do

Reading the vehicle step by step, the severity traffic light, clearing codes safely, seeing live data and asking for help.

Reviewed by Daniel Morales, founder of Reprorace SL, on

Where: Remote sessions › Diagnosis › Automatic diagnosis, and in the app, Vehicles › Diagnose

1. Before you start

  • The unit plugged into the vehicle's OBD port, usually under the steering wheel.
  • The ignition on; you do not need to start the engine.
  • The unit active and connected. If it is not in the list, check it in “Tools”.

2. Read the vehicle

  1. Choose the unit and press “Diagnose”.
  2. Wait: the unit detects the vehicle, identifies it and reads every control unit. The screen shows what it is doing at each moment.
  3. If it does not recognize the vehicle, choose its type and press “Read anyway”.

3. Understand the result

Traffic lightWhat it means
All goodNo faults or important warnings in the control units that answered.
Some things to checkThere are warnings or non-urgent faults: check them when you can.
There are serious faultsThere is at least one serious problem, such as the warning light on: follow “What to do”.
The vehicle could not be readNo control unit answered: check the connection and the ignition and try again.

Each problem shows its severity, the code, what it means and what to do, with the most serious first. In reads made with “Read vehicle”, the “In a nutshell” block shows the same traffic light above the full report.

4. What next

  • Clear the codes: only after the repair and with the owner's permission. First you will see what is lost (warning light, freeze frames and inspection readiness) and you will have to confirm it with your second factor. If the fault is still there, it will come back.
  • See live data: “See live data” takes you to “Watch live”; choose the dashboard and the duration. Use it to watch temperatures, engine speed or the battery with the engine running.
  • Ask for help: “Ask a workshop or expert for help” takes you to the community's experts. In a personal account you can also ask your workshop for assistance.
  • Report: “See the full report and sign it” opens every detail and the signed report for the customer.
MessageWhat to do
The unit did not answer in timeCheck that it is plugged in with the ignition on, and try again.
The unit is busy with another orderWait for the other read or function to finish.
Confirm your identity with your second factorIt is required to clear codes: complete the verification and try again.
Your role does not allow reading vehiclesAsk whoever manages your organization for the diagnosis permission.

Tip: If you do not know what to do with a red result, do not clear anything: ask for help and share the report.

Open the platform See it in the help centre

Can we help you get started?

Leave us your details and we will tell you how Diaglana fits your workshop, your fleet or your car.