OBD2 Bluetooth reader

Help, I'm on the road and want to use the cheap ebay bluetooth reader but I've forgotten the oairing code. 0000, 1234, 12345 have failed so far.

Anyone got the code.

 

Both of mine are 1234 but I did have a faulty one that would not accept any of the codes
Seller sent me a new one

EDIT
make sure your phones Bluetooth is set to "visible"

 

just had a look online and found a youtube video - says code is 0000, 1234 or 6789
Good luck!

 

Odd, 1234 eventually worked.

Thanks all.

Now tracking down, 0171, seems to be a vacuum leak somewhere.