Thanks Paul, I now have a new Lambda sensor (still to fit) and my vagcom cable arrived today.. results are as follows 00258 solenoid 1-n88 , open circuit 00260 solenoid 2-n89 , open circuit 00262 solenoid 3-n90 , open circuit 00264 solenoid 4-n91 , open circuit 00266 solenoid 5-n92 , open circuit 00268 solenoid 6-n93 , open circuit 00270 solenoid 7-n94 , open circuit So fingers crossed hopefully a bad connector or bad earth somewhere