Sudden ABS, Trac, Brake Hold, Headlight, and even more errors
Thread Starter
Driver School Candidate
Joined: Mar 2023
Posts: 19
Likes: 1
From: NY
Sudden ABS, Trac, Brake Hold, Headlight, and even more errors
Hey all,
Looking for some thoughts as to what the root cause might be...
2013 LS460L with 158k miles. Out of nowhere, while driving, suddenly the ABS and Trac lights came on (and warnings in the center of the dash). About 30 seconds later, headlight and BSM system also gave a warning. And a few minutes later, Brake Hold (which isn't even on) started warning. Cruise control disabled. Then, the lights went out the next day and came back later on in the day. I scanned the car with techstream and got the following:
ABS: C13AF (EPM System Malfunction) / C1464 (Front Speed Sensor RH Circuit) / U0100 (Lost Communication with ECM/PCM/EV "A")
BSM: C1A45 (Vehicle Speed Sensor)
AFS: B2415 (Vehicle Speed Sensor)
Cruise Control: C1A50 (Brake System)
Electronic Parking Brake: U100
Ok, so maybe a wheel speed sensor, fine.... but then the lights went back out for a day or 2 on their own (no code reset).... and tonight, again out of nowhere, while driving....
Check Headlight, Check Parking Brake System with ABS and Trac lights.... and a new light - not the triangle master warning light (that also came on), but the circular warning light (this did not come on the first time). And then the Speedometer, Tachometer, and Temp gauges just went to 0. Then the gauges came back, died a second time, came back a second time and I was home.
I have to imagine a much bigger underlying cause then everything deciding at once to die. I'm hoping someone here looks at the massive list of codes and systems and says "ah yes, this 1 thing can trigger all of this" because right now, all I can think of is a computer or wiring issue.
Thoughts?
Looking for some thoughts as to what the root cause might be...
2013 LS460L with 158k miles. Out of nowhere, while driving, suddenly the ABS and Trac lights came on (and warnings in the center of the dash). About 30 seconds later, headlight and BSM system also gave a warning. And a few minutes later, Brake Hold (which isn't even on) started warning. Cruise control disabled. Then, the lights went out the next day and came back later on in the day. I scanned the car with techstream and got the following:
ABS: C13AF (EPM System Malfunction) / C1464 (Front Speed Sensor RH Circuit) / U0100 (Lost Communication with ECM/PCM/EV "A")
BSM: C1A45 (Vehicle Speed Sensor)
AFS: B2415 (Vehicle Speed Sensor)
Cruise Control: C1A50 (Brake System)
Electronic Parking Brake: U100
Ok, so maybe a wheel speed sensor, fine.... but then the lights went back out for a day or 2 on their own (no code reset).... and tonight, again out of nowhere, while driving....
Check Headlight, Check Parking Brake System with ABS and Trac lights.... and a new light - not the triangle master warning light (that also came on), but the circular warning light (this did not come on the first time). And then the Speedometer, Tachometer, and Temp gauges just went to 0. Then the gauges came back, died a second time, came back a second time and I was home.
I have to imagine a much bigger underlying cause then everything deciding at once to die. I'm hoping someone here looks at the massive list of codes and systems and says "ah yes, this 1 thing can trigger all of this" because right now, all I can think of is a computer or wiring issue.
Thoughts?
Pit Crew
Joined: Oct 2012
Posts: 204
Likes: 82
From: Alberta
Most likely cause is battery near end of life or grounds. Test the battery with a proper toaster style tester. The digital tester most places use often says battery is good when it isn't. About $20 at
Harbor Freight or Amazon.
Harbor Freight or Amazon.
Thread
Thread Starter
Forum
Replies
Last Post
Saadq12
GS - 4th Gen (2013-2020)
13
Oct 30, 2022 06:23 PM
chungmeow
GS - 2nd Gen (1998-2005)
1
Sep 25, 2015 11:48 PM
Jace_91
SC430 - 2nd Gen (2001-2010)
4
May 14, 2009 03:13 PM