From a few pages back so a bit of thread drift to talk about fault code readers again but not worthy of a new thread.Tom wrote: ↑Mon Sep 03, 2018 8:14 pmhttps://www.amazon.co.uk/Torque-Pro-Elm ... s=elm+obd2
This is the gizmo I use along with the free Torque app on my smartphone. Really does work!
Gizmo delivered promptly as expected of Amazon UK, cheap, a great interface if it works for your vehicle but was a chocolate tepaot for mine, old Skoda said "no fault codes found" whereas I know there are loads, perhaps they would have been in the historic code log but I had not seen that option and the car is now scrapped.
New one has Can Bus comms to the OBD socket and to from all the controllers that hold the data, the gizmo would not connect to the car, tried again today and found the casing was too large and prevented correct insertion on my vehicle so removed casing and plugged in bare board, result, it connected! But still no fault codes anywhere yet the airbag light is on and I know that there is a 253 passenger airbag fault logged by the airbag controller.
Have bit the bullet and bought the renowned VCDS Vagcom software and dongle (£225) which is a must for a modern VAG can bus vehicle but wont work for other makes.
Seemingly there is a difference between generic OBD codes and the embedded ones, at my mates UK garage none of their readers could find the fault codes but the £3K Snap on one from next door could go down through the sub systems like VCDS, read and erase them but not run functional tests or change parameters.
you pays your money you take your choice but if you want to do your own repairs and diagnosis being the most important thing then an earlier vehicle with non can bus OBD protocole is better.