there's a pretty good chance that over the years the connector has become brittle due to the heating and cooling cycles and when you removed the filter, you may have inadertently broken it free. if so, you're going to have a hard time locking it back in place.
Is there any oil leaks from around the sensor? that probably won't help anything, and if the oil got inside the connector, it could be taking the voltage signal straight to ground, instead of your guage.
It's a little to coincidental that your oil pressure would quit on you right after an oil change, so i think mechanically, your lubrication system is fine.
__________________
my carbon footprint is bigger than yours
|