Hey community!
First off, thank you all for the amazing support!!! I don’t know what I would do without the support of everyone at IH8MUD.
I have a 2001 Toyota Land Cruiser.
Here is my abbreviated story. My brake pressure sensor was going off so I took it into my favorite shop and then the Toyota dealership. My favorite shop suspected the brake booster but wanted me to take it to Toyota for a second opinion. They also said they couldn’t ping the VSC module and it might need to be replaced as well. Toyota told me I needed a new master cylinder and confirmed the bad module.
I got online and bought a rebuilt master cylinder and module on eBay and installed the new master cylinder using Tommy the tool man’s YouTube video and installed the module and used TechStream to do the calibration (and I did get the lights to flash at the end).
After the repair, periodically my ABS VSC and TRAC lights come on. If I push on the brakes hard they go off but will come on after I drive for a while at random. I pulled the codes from TechStream and get C1223 (abs system failure) C1246 (brake pressure sensor). I messaged the person who sold me the master cylinder and they sent me a new brake pressure sensor which I installed and then bled the brakes and used TechStream to do the air bleed off the ABS. I also replaced the brake pedal positioning sensor (brake light switch) but am still having the same issue with the lights coming.
Additionally, my slip indicator light is coming on and the alarm is sounding anytime I make even the slightest turn of the wheel when I am driving above 30mph. if I turn the wheel the opposite direction it turns off, if I don’t it will apply the brakes for me after a period of time.
I am not sure if these are related, but since they both happened at the same time I thought I would group them together.
Any suggestions on what I should try next?
I’m at a total loss at this point
And if I have missed any important information please let me know!!!
First off, thank you all for the amazing support!!! I don’t know what I would do without the support of everyone at IH8MUD.
I have a 2001 Toyota Land Cruiser.
Here is my abbreviated story. My brake pressure sensor was going off so I took it into my favorite shop and then the Toyota dealership. My favorite shop suspected the brake booster but wanted me to take it to Toyota for a second opinion. They also said they couldn’t ping the VSC module and it might need to be replaced as well. Toyota told me I needed a new master cylinder and confirmed the bad module.
I got online and bought a rebuilt master cylinder and module on eBay and installed the new master cylinder using Tommy the tool man’s YouTube video and installed the module and used TechStream to do the calibration (and I did get the lights to flash at the end).
After the repair, periodically my ABS VSC and TRAC lights come on. If I push on the brakes hard they go off but will come on after I drive for a while at random. I pulled the codes from TechStream and get C1223 (abs system failure) C1246 (brake pressure sensor). I messaged the person who sold me the master cylinder and they sent me a new brake pressure sensor which I installed and then bled the brakes and used TechStream to do the air bleed off the ABS. I also replaced the brake pedal positioning sensor (brake light switch) but am still having the same issue with the lights coming.
Additionally, my slip indicator light is coming on and the alarm is sounding anytime I make even the slightest turn of the wheel when I am driving above 30mph. if I turn the wheel the opposite direction it turns off, if I don’t it will apply the brakes for me after a period of time.
I am not sure if these are related, but since they both happened at the same time I thought I would group them together.
Any suggestions on what I should try next?
I’m at a total loss at this point

And if I have missed any important information please let me know!!!