(Intermittent) BRAKE Light on Dash Stays On

I have absolutely no idea what could be causing this at this point. 2010 Tundra 4.6, brake fluid level is right at the max line, flushed a couple months ago by the Toyota dealer (issue was happening before this as well), brake pad level appears to be fine as well, no leaks spotted around the hubs or the firewall, so all of the common issues that cause this light to come on seem to be okay. Light normally comes on after driving a few minutes. Some days it comes on every day and some days it stays off. Is there anything else to check? Does this light throw a code / can it be read by a code reader? I’m not too sure where to go from here so any help would be great. Thanks!

 

Sounds like the sensor that reads the brake fluid level may be going bad. Have someone sit in the car while you move the level sensor up and down to see what the light does

 

Ah gotcha, is that the sensor that plugs into the bottom of the brake reservoir? Or is there another sensor to move around that I'm missing?

 

I’m talking about the one in the cap

 

Oh duh, makes sense. I'll test that out and see if that shows any results

 

So bit of an update, went ahead and replaced the brake fluid reservoir that houses that sensor in the bottom and all was well for about a month or so, then after a long drive over the weekend the light came back on. I'll be checking for corrosion in the connector but does anyone else have any ideas on where to look? I'm at a loss with this one.