Are you asking specifically about VCDS or just OBDII devices generally?

This post covers how to verify key functionality but requires either VCDS or OBDeleven -

https://www.ttforum.co.uk/posts/9621337/

 

More so if there was a way to make it relearn what coding it had. It basically doesn't operate the central locking at the moment. Everything else is fine, car starts without issue using the key.
My vcds isn't working.

 

"My vcds isn't working."

Have you updated the software? The current version is 25.3.2. Link to the download here.

 

Hi, If you have 2 fobs try this way.
1. One key in ignition in on position, but engine stopped.
2. Other key in the drivers door lock from outside and lock with key manually.
3. Then, with key still in lock and within a few seconds, press UNLOCK button ONCE on that key. Indicators will flash.
4. Remove key from door lock, wait 10 seconds and test. That key should be re-synced with car.

Repeat with keys reversed to program second key, but at step 4 press UNLOCK button TWICE (to code key to second memory position).
Repeat for up to 4 keys with appropriate button presses for each memory position.

If only 1 key.
Lock using key in door & then press lock button on fob. Try more than once. Sometimes works

If neither way works, I have another way which sometimes works.
Hoggy.

 

Nice one Hoggy. I've added that to the KB -

https://www.ttforum.co.uk/posts/9621337/

 

Hoggy I only have one key - tried a few times, only succeeded in setting the alarm off

 

Hi, Setting the alarm is normal, even if it worked.
My other way requires 2 keys, but I will post anyway as may help someone else.
Hoggy.

One key in the ignition and switched on with engine not started
Close drivers door and put key in lock
Push unlock button down and hold down
Keep unlock pushed and turn key to lock, then turn key to unlock, release unlock button
Remove key, open door and remove key in ignition
Key should now work

To set the failed key in ignition, follow same steps except when you lock, unlock you will need to lock and unlock again as this will set the second key to be number 2 key