How Long Does a Car Diagnostic Test Take?

A normal car diagnostic test should only take a few minutes to complete. Every car diagnostic test starts with check engine light code reading, OBD2 Codes reading, and this will only take several minutes. The mechanics will plug in a car diagnostic scanner to read the trouble codes which indicates where the problem is. 

After pulling the Diagnostic Trouble Codes, the mechanics will then do some investigative work to get a more accurate picture of what is functioning incorrectly and how best to fix it depending on the error codes that appeared.

If you decide to take your vehicle to A1Garage, you should be prepared to wait a little bit before the test and stay afterward to discuss what issues were found and how they can be resolved. I’d say you should expect to spend at least an hour for any car diagnostic test, and 2-3 hours could be a reasonable estimate.

Our diagnosis will cover the following, plus much more:

  • Automotive Charging System repair with proper diagnostics
  • Alternator replacement
  • Power windows/seats/locks diagnostic and repair
  • Headlights, turn signal lights, dome lights and taillights bulb replacement
  • Abs system faults
  • Airbag system faults
  • Dpf/emission faults
  • Engine management


  • Airbag Lights
  • Engine Service Lights
  • ABS Lights
  • Engine Management Lights
  • Diagnostic – clear and read codes
  • Tyre Pressure Management


  • Fault Finding Categories
  • Central Locking – Locks
  • Electric Windows
  • Lighting Systems

Request a quote today