It's only $200 if you do it all yourself (new sensor, new fluid, new filter, new gasket) assuming you have all the tools. New sensor pins line up perfectly with the old one (no guessing what plugs into where). See post below.
https://www.camaro6.com/forums/showp...&postcount=150
Mine use to do the same thing and sometimes wouldn't register at all. I drove for a few years like that and I'm close to 161,000 miles so I would safely say it doesn't require immediate attention.
Only takes a few hours. Video below helped me a lot. Just make sure you get the right parts and fluid.