Installed the WOT defeat plug a couple of years ago and now due the 5 year coolant change at the dealer. Is it better to leave the WOT defeat plug in place (concerned they may remove it and throw it away and install a new sensor) or take out the defeat plug and reinstall the old sensor (concerned this might cause a latched code that I will have to pay for in addition to the coolant change)? Has anyone reinstalled the old sensor before dealer servicing without any problems? Any thoughts on the best option?
Mike
Mike