Brake override system failure
#1
Brake override system failure
Hey guys, anyone had this show up on their dash before? It showed up this morning just as I was pulling in to park at work. I doubt that it's the wiring down by the rear control arms like some others have experienced after lowering. Won't have a chance to look at it until later after work. Just wanted to know if anyone has an idea or has had it happened on their F. Thanks!
#2
I've had this on multiple occasions. Your car is going to go into limp mode so be careful when driving as you'll lose power. Try to run the code and see what it is. If you can get to dealer that would be ideal as they need to scan with their tools and get approval for work. Mine ended up being faulty throttle body assembly, which was replaced under warranty.
The following 2 users liked this post by Sparker:
Dennis1123 (07-13-17),
JT2MA71 (06-17-17)
#3
I've had this on multiple occasions. Your car is going to go into limp mode so be careful when driving as you'll lose power. Try to run the code and see what it is. If you can get to dealer that would be ideal as they need to scan with their tools and get approval for work. Mine ended up being faulty throttle body assembly, which was replaced under warranty.
#4
Well, got home and I disconnected the apex throttle controller and warning light and check engine light are both gone. Connected the carista unit and retrieved the code, P2121. Cleared it and will drive later to see if it's completely gone. Right now, it looks like the throttle controller is the issue.
#6
Keep in mind the Lexus tech will physically need the code/light active when diagnosing with their equipment. My throttle position sensor was faulty but it comes as an entire unit so the full assembly was replaced. FYI I do not have the apexi controller but they may try to use it against you to get $ out of pocket. In my experience it'll likely come back on especially if it's warm and your doing some spirited driving and limp mode is not fun.
#7
Keep in mind the Lexus tech will physically need the code/light active when diagnosing with their equipment. My throttle position sensor was faulty but it comes as an entire unit so the full assembly was replaced. FYI I do not have the apexi controller but they may try to use it against you to get $ out of pocket. In my experience it'll likely come back on especially if it's warm and your doing some spirited driving and limp mode is not fun.
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#10
The Apexi controller has been working fine in my car for 2 weeks now. I have yet to experience an issue and I use it in almost every mode besides Yellow/White.
#12
check you connections on the throttle controller. Something might be loose. Then you know if its the Apexi device. You can always remove it. As someone who has had the Apexi since day one ( it was a much in my '14-350 Fsport ), I only really use it to be a boost off the line when red-light racing. Or go into yellow on the highway / sometimes purple. The controller with the tune ( I am full bolt on with headers ) makes the power delivery to the car unbearable.
The following users liked this post:
JT2MA71 (06-20-17)
#13
check you connections on the throttle controller. Something might be loose. Then you know if its the Apexi device. You can always remove it. As someone who has had the Apexi since day one ( it was a much in my '14-350 Fsport ), I only really use it to be a boost off the line when red-light racing. Or go into yellow on the highway / sometimes purple. The controller with the tune ( I am full bolt on with headers ) makes the power delivery to the car unbearable.
Good to know! It's on the second day without it hooked up and it was pretty warm yesterday and car was driven around as aggressive as it can be without getting into trouble. No issues. I will hook the controller back up later today and do the same thing.
#14
Lexus Test Driver
Ron,
you hook it back up? Any codes or messages? Just curious.
I have the apexi TC on my car too but hardly ever use it.
Red mode makes the throttle so touchy...
you hook it back up? Any codes or messages? Just curious.
I have the apexi TC on my car too but hardly ever use it.
Red mode makes the throttle so touchy...