I'm noticing my brake light sensor on my dash lights up more often than usual. There is sufficient fluid in the master cylinder. I had my master/slave cylinders replaced earlier this spring. Any thoughts on this?

 

pads?

 

Nope, even with the pads/rotor were already replaced; I routinely service my vehicle @ the dealership every 30K, and it includes flushing the brake lines all the time. Regardless, the sensor should be engaging if either the parking brake is applied, or if the brake fluid is low.

 

true true..well i would be in your shoes if i was you.

good luck hopefully somone gives you a little insight.

 

my 5th gen does it in the cold weather all the time. check the brake fluid level.

 

if i remember right i think if u change the filter in the brake reservoir it will solve your problem

 

Don't have a solution, but every winter my 99 Prelude's brake light comes on... will turn off sometimes after I have been driving for a certain amount of time, other times it will just stay on.

 

Tis the season for this question, lots of people have this problem this time of year. You can fix it by changing out the screen. In my case, I opened the reservoir and manually slid the float up and down a few times. Apparently the float was sticking because it hasn't happened since and its been a few years.

 

How long has it been since you changed your brake fluid? Moisture build up in the fluid will also cause the brake light to go on (had this happen once and as soon as I changed my fluid it went away). I'm guessing it takes a reading through some kind of electrolysis or resistance or whatever, so when the fluid and moisture is colder, it sends a lower reading triggering the light; when the car, or more specifically the fluid, has warmed up the reading moves into an acceptable range. Just speculation, though...

 

I'm going to try these fixes and take pics so this can be added to the FAQ or whatever, it's a very common problem and I've had it since last winter. Of course I won't know if it worked or not for a few days, friggin' 80 degrees in December, hooray Texas.