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This however, requires to be decoded and that is exactly what the VAG-COM software does for the Audi and Volkswagen engines. It uses the OBD-II on-board diagnostic system which is part of the engine operating parameters.

Sometimes modifications need to be made to get the optimum performance and using the VAG-COM before and afterwards will show what the improvements are after the Volkswagen or Audi engine has been modified.

Using diagnostic systems will show exactly where the problem lies letting you do the required repairs and getting it back to its best performance.

A person generally knows when a vehicle is not running right and often the symptoms are obvious with bad idling, struggling to start and loss of power.

There are lots of car enthusiast that like to check if the car is running according to the original OEM specifications… and doing the diagnostics using the VAG-COM with a VW or Audi… will do exactly that.

Using the VAG-COM diagnostic tool will show you the state of your engine, how it is performing and then you can make the required adjustments to ensure that your car runs as economical as possible and reliably. On of the key components to good vehicle maintenance, repair or upgrade is to make sure that you have the right tools and know how to use them. The VCDS diagnostic system uses a more detailed manufacturer protocol commands and allows the user to access all the diagnostics that have been installed in the vehicle provided it is a Volkswagen or Audi. The type of diagnostics that can be done range from engine related problems such as diesel ignition timing to coding a new electronic control unit (ECU). Therefore if you have a VW or Audi that was assembled from 1990 to present – you can immediately and safely use the VAGCOM-VCDS diagnostic tool.Ī car owner/mechanic can use the VCDS system for virtually all the functions that the dealer diagnostic tools can perform.īefore the owners of a vehicle had no option but to take their vehicles to a dealership to run the diagnostics… but now with VAG-COM… the smaller independent workshops, or DIY’er can perform key functions using vehicle’s onboard computer technology. VAG cars have been scannable (starting out with OBD1) since 1990’s.

It also works on non-VAG vehicles, but is limited to generic OBD2 system of Engine and Transmission.

Hence it’s a diagnostic software that will diagnose vehicles with VAG engines, meaning it covers nearly all Audi, Volkswagen Seat and Skoda models. And VCDS is the Windows based software that is developed by RossTech – which uses this Interface to log into car’s ECU diagnostics computer. Ok, first of all what is VAG-COM or VCDS? VAG-COM is a cable Interface that plugs into the car’s OBD port.