after i started and warmed my car up this morning and started heading to work I noticed my brake light was still on. After I started driving for a while it went off. On the way home from work it did the same thing again. Why is it doing this? I was thinking it was from the cold weather from last night.

 

Check to see if you're low on brake fluid.

 

that will cause the light to stay on?

 

Yes, that's why I recommended checking it.

 

checked it and its full, I think it might be from the cold weather cause that was the first real day of being cold and thats the first day it happened

 

Open the cap and shake the sensor, it might have gottn stuck. be sure not to splash any Brake fluid- takes paint off.

 

at this moment I'm going threw the same thing.

I've check the fluid and its fine. I had Acura change the brake master cylinder and it still happens.

Acura advised to park the car and leave the e-brake down and start it in the morning. (Theirs a sensor in the e-brake, they wanted to know if that was the problem). The brake light still came on.

I going to take it to them again. I let you know what they say.

 

good deal let me know, more than likely that will be my problem too

 

Same thing happens to me. It goes away pretty quickly tho so im not sweatin it.

 

It's probably your brake reservoir cap. These have been known to go bad and trigger that light. Try replacing it with a known good one. You can always just unplug the sensor if it is a bad cap, that should eliminate the light.

I feel sorry for all of you who paid to have new MC's and such put in when it's such a simple fix

 

Since you say the fluid level is fine, my bet is on the cap.

The switch ("sensor") Dee Cee 2 R is tlking about is the parking brake switch. This is a very simple device and I've never seen one fail even in 20+ year old cars.

The cap is often the problem, and acura reused the old res. and cap when they swapped the master cylinder.

 

this has been covered a bunch, but yeah, xjohnx hit the nail on the head.. i had the same problem a couple months ago.. new cap = no light.. the sensor goes bad.. mine did the EXACT same thing yours is doing.. mine didn't do it every morning, but occasionally..

 

How much is a new brake reservoir cap anyway? How much from acura themselves?

 

Same thing happened to g/f's mom. Filled up the brake fluid

 

so a new brake fluid cap will take care of the problem?