All valid points . .. except it's my WIFE's car. She will be much more likely to see the idiot light than anything else. Regardless, new sensor is in and all is good. Car runs much better with new plugs, tb cleaned and no coolant all over the intake. Thanks for all the help guys, much appreciated. Now on to f-body front brakes (after driving my '95 525 exclusively for the last few weeks and getting back into this car, these original breaks suck) and lowering.