it may be your egr flow that's connected to your egr valve. my car has that problem right now! its a Honda 98 accord v6.
You could be pressing the brake pedal too hard. Another reason why it may jerk is because the pull brake is engaged.
The brake light in the dash would be on because the emergency brake is on. If you mean the brake lights in the back, this would be because you are pressing the brake peddle or something is broken.
It would be the rubber pad that sits on your brake pedal. Unless they were referring to brake pads, which are the pads which enables your vehicle to stop by pressing the brake pedal.
The first thing that I would do is look at the arm of the brake pedal and make sure the arm is pressing against the brake switch, press the brake pedal with your hand and see if the switch head goes in. Also if you have someone with you have them watch the brake lights and use 2 fingers and press the head of the switch in and ask if the brake lights are on,it may be that the switch is bad. this would be step 1. depending on how old the vehicle is you may have a broken 12 volt wire or a ground wire, if your turn signals work and your taillights work I would first check the brake light switch. i have never seen 2 brake light bulbs go bad at the same time.
Brake booster problem?
Air in the brake system. You need to bleed the air out of the system.
You may have a bad power brake vacuum operated booster.
No the chocolate chips would clog the pressing machine.
there's not hand brake. what you would find is a pedal brake in the bottom left of the driver side. Witch you press down to apply it, and press down again to release it. Hope this help you.
If you mean that you can't shift the shifter while pressing on the brake, I would say that it is down by the brake pedal.
I would say your power brake booster is shot.
Check for a loose fuse, check your wiring, check the connections, sounds like something is loose. Also make note as to when it turn off, are pressing the brake? using the turn signal? I had a firebird that every time I press the brake the signal lights would turn on and the radio would turned off, that turned out to be I used the wrong bulb in my brake lights