No generic "scan any car" reader can pick up all faults on all cars.

Your best bet is to get a clone of what the dealers use.

And, as elekie&a/c doctor says above, its all about interpreting the codes and reading live data.

Many people (and some garages) just read the code and throw the corresponding part at the problem.

Like the garage who told a customer of mine that the fault was with the O2 sensor. It kept failing after a couple of months.

After the third sensor (at the customer's expense) he came to me and I found the problem - a small oil leak from a gasket which was dripping onto the cable which fed the O2 sensor. After a few weeks the O2 sensor connector would be filled with oil and no longer provide a good electrical contact.

Edited by Gibbo_Wirral on 10/05/2023 at 13:16

Carista resets my service warning, which can't be done by the MMI.

It also customises 100's of things, which is why I pay a yearly fee instead of a one off £10 hardware reader? (They only reset oil changes, which the MMI does anyway).

I have read of a person bricking their ECU and having to contact Carista to sort it out. Admittedly, I don't know how true that is.

I have been servicing my A7 for 4 years now and resetting the Service Warning.

How can you tell me that's not possible?

caristaapp.com/en/supported-cars/audi/a7/c7

Check it out.

The OP asked about an EOBD scantool. I don't know of any that aren't read only. Your scantool must be more specific with the ability to make adaptions and carry out recoding. If you're going to recode a module it's a very good idea to save a log first before you do anything. That way you can always recode again back to what it was. If you can't save a log then write down all the controller information before you make any changes.

Carista resets my service warning, which can't be done by the MMI.

It also customises 100's of things, which is why I pay a yearly fee instead of a one off £10 hardware reader? (They only reset oil changes, which the MMI does anyway).

I have read of a person bricking their ECU and having to contact Carista to sort it out. Admittedly, I don't know how true that is.

I have been servicing my A7 for 4 years now and resetting the Service Warning.

How can you tell me that's not possible?

caristaapp.com/en/supported-cars/audi/a7/c7

Check it out.

The OP asked about an EOBD scantool. I don't know of any that aren't read only. Your scantool must be more specific with the ability to make adaptions and carry out recoding. If you're going to recode a module it's a very good idea to save a log first before you do anything. That way you can always recode again back to what it was. If you can't save a log then write down all the controller information before you make any changes.

There are lots of EOBD Scantools out now that work via mobile phone Bluetooth.

The good ones are subscription.

These are not new technology. They all do more than read codes.

Click on my link, you will be Astonished or at least Educated?

Where have you been? Check out Playstore!

You seem to be failing to understand what EOBD is. As I said earlier, EOBD (known as OBD II in North America) is a standard by which all cars intended for use in most countries are now compliant, and which allows access to engine emission data only. Any scantool capable of doing more than that is not simply meeting the minimum requirement. I'm not in any doubt how good your scantool is but it's not merely EOBD. I use VCDS myself, but as I said, you cannot do any harm using the read only functions. Apart from deliberately sending a live feed up the data link wire which would have to be done deliberately, the only way you could do any harm is by writing to the controller which generic EOBD scantools cannot do. Maybe the OP is looking for a more specific scantool but £100 isn't going to buy much. Generic EOBD dongles that Bluetooth to a mobile phone are quite cheap, starting at not much more than a tenner.

The OP originally asked which EOBD would work with a Mobile Phone.

Carista is an EOBD2 Scanner.

Mine cost £25 for the dongle, one month free software trail, then approx. £40 a year thereafter.

What part can't you grasp?

You seem to be the one not grasping it. The OP said he wanted an EOBD scantool that he could use with his phone. He also said he didn't want to spend more than £100. You can get those from little more than £10 if EOBD capability is all you want. Your scantool is capable of much more than EOBD and therefore well in excess of the OPs requirements.