Thanks Richard. Do you mean to read the pins like on this socket? http://www.dashwerks.com/images/obd2_connector.png Do I have to use the OBD1 table(two digits) from your link? There is explained how to reset the memorised errors removing a fuse.Which fuse( where it is)have to remove for Avensis? Hi, Yes its that socket, a thin piece of single core wire does the trick and the OBD1 table for our engines - I'll guess its code 21 - O2 sensor ? Cannot remember the fuse - ended up just disconnecting the battery - just make sure you have any radio security codes to hand.