oops, at -3 f my 10/40 turned to jello, when I fired up the pressure went to 85+ psi and then to 0. engine seems fine, think I just popped the pressure switch diaphragm and am getting a dead gauge error, not actually 0 psi

 

why are the pressure senders so expensive?

What is the vehicle? If it's a GL or a Loyale don't really worry too much. All the gauges mess up. Just listen to your car to make sure it doesn't start tapping badly. Every older subaru I've owned has had a messed up gauge...sometimes it works sometimes it doesn't

What is the vehicle? If it's a GL or a Loyale don't really worry too much. All the gauges mess up. Just listen to your car to make sure it doesn't start tapping badly. Every older subaru I've owned has had a messed up gauge...sometimes it works sometimes it doesn't

 

Might not be the gauge but the sender..an easy fix.

 

Just my 2 bucks

or the wire came off the sender.

I agree with both as well!

Here it is, located down by the oil filter

My knife is for size reference

Ground the wire to it and see if the gauge pegs.