tuztime889

I scanned the computer and got code c1201 The vehicle acts like it has a bad power booster. Could this be a common or likely prob with these kinds of cars since I've never had to do one before

SlenderKen

I'm not sure about the code, but the hard/pulsating brake pedal may be due to your brake rotors being uneven. Whenever you change your brake pads you/the person you changes your brakes should shave off the brake disks because it will be uneven. If you don't shave it, then it can be uneven and cause uneven wear on your brake pads and then you could feel it in the brake pedal.

primavera

Possibly warped rotor(s). You can have them resurfaced or just get new ones.
http://www.rockauto.com/

flowrider

iTrader: (9)

https://www.clublexus.com/forums/es-...057-p0161.html

BTW, brake rotors don't warp.

Lou

primavera

They don't?

Grizsk

They don't technically warp, but even pros use the terminology inaccurately. Things like lateral runout and disc thickness variation are more accurate. Rotors are forged at extreme temperatures, often 5 times that of any temp they'll reach while on your vehicle. To physically 'warp' a rotor would require similar tempuratures to those used during the forging process.

I currently have a front drivers side oscillation, diagnosed as irregularities in the thickness at different points in my rotor from extreme tempuratures caused by 'aggressive' braking. New rotors and pads all around tomorrow

Cooker883

Pulsing on my LS460 2012 universally has been caused by hot-spotting — moisture trapped between pads and rotors, which then causes rust while the car is garaged.

coolrydz

A C1201 code is almost always caused by a poor electrical connection or a wiring harness that is damaged physically. These components control the normal operating voltage levels, so anytime there is a disruption to the circuit, the ABS module will pick up on it since it is continuously tracking its performance. You need to check the wiring to your ABS system. Bad rotors don't throw codes

Bigguy818

I have the same symptoms right now pedal pulsing at any speed over 65mph, I feel it’s the rear rotors cuz my steering wheel doesn’t shake.
when I first purchased my car, I had that as well but after resurfacing rear rotors, it was very smooth, I just think I’m due for rear brakes. Pads and rotors.