Could someone please describe for me the test for an oxy sensor that is done using a battery. I watched a guy do this in a shop one day and he correctly diagnosed that my sensor was bad....... Brian Honnold '78 Rocco Ragtop -- To subscribe or unsubscribe, send email to scirocco-L-request@scirocco.org, with your request (subscribe, unsubscribe) in the BODY of the message.