Brake pedal goes right to floor. Plugged in Superchips to read code and P0935 comes up. What do I need to do to fix this issue? Any suggestions would help, thanks

 

Maybe a bad master cylinder or one big leak somewhere.

As you know P0935 is Hydraulic Pressure Sensor Circuit High

You can try looking here for more help of info on it


B/C/P/U 2004-2006 codes in full details from AllData

 

Have ya checked the fluid???

 

Yeah I Checked the fluid and it was low. Topped it up. Looked around all over prior for signs of a leak and there was nothing. Is there a chance the master cylinder is holding all of the fluid?

 

You could try bleeding each caliper and see if there is fluid in them but I dont see how it could not be

 

Yeah I'm puzzled. Can't see a leak so I'm not too sure on what to do

 

did you notice your brakes getting weaker over time or all at once

 

^^^ about them going at once or slowly spongy over time?? Did you look at the ABS module and around that to see if there was fluid there maybe trapped in it's housing? I have like a mini box the ABS module sits in and it can hold prob a cup of water.

 

On my old 91 explorer I had something similar. Barely any brakes, my brake light was on. Turns out I had a bad master cylinder.

 

it will tend to have an internal seal failure and leak all the fluid into the booster if there are no visible signs of a leak.
check for vacuum lines going to the booster. pull it off and check for fluid.