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  • 2015 - 2023 (S550) Mustang -General/Talk

2019 GT Line lock

  • Thread starter Thread starter gray owl
  • Start date Start date Jul 18, 2026
G

gray owl

Member
Jan 19, 2026
43
10
18
Alberta Canada
Jul 18, 2026
#1
  • Jul 18, 2026
  • #1
Can't get the line lock to engage. It says its engaged but its not. I go through the process , get into the screen press the pedal down hard, it says engaged but the front brakes just release if you let your foot of the pedal. It wont hold. Any thoughts
 
Last edited: Jul 18, 2026
B

Bronco2fan

Member
Apr 10, 2025
20
7
13
Tx.
Jul 23, 2026
#2
  • Jul 23, 2026
  • #2
I never tried the line lock on my 2019 GT PP1. May have to see now.
 
G

gray owl

Member
Jan 19, 2026
43
10
18
Alberta Canada
Jul 23, 2026
#3
  • Jul 23, 2026
  • #3
Its really a stupid system, what should be a simple on off switch , some moron engineer had to complicate everything to the point where its unreliable. I have read the manual, read 10 you tube posts mine simply does not work. Sometimes engineers need to just STOP over engineering.
 

Noobz347

Stangnet Facilities Maint Tech... Er... Janitor
Admin Dude
Jan 4, 1985
43,351
21,550
234
Box behind Walmart
Jul 23, 2026
#4
  • Jul 23, 2026
  • #4
I don't have a '19 or later so this is part speculation:

Do you have a code reader that can scan/read the ABS unit in the car? If it's a solenoid failure, there should be a fault code in that system. In know FORScan can do this too but not sure how prolific that is.

There are others here that know a lot more about this portion. ^^


Also: Just to be sure, are you pressing hard enough on the brake pedal when you go to set it?
 
G

gray owl

Member
Jan 19, 2026
43
10
18
Alberta Canada
Jul 24, 2026
#5
  • Jul 24, 2026
  • #5
No i don't have a code reader, but i will try source one. As far as pressing on the brake i am pressing so hard I am afraid the pedal shaft may break, i mean literally standing on it.
 
B

Bronco2fan

Member
Apr 10, 2025
20
7
13
Tx.
Jul 24, 2026
#6
  • Jul 24, 2026
  • #6
Have you tried looking in the Mustang 6g.com forum? S550 go to for questions.
 
G

gray owl

Member
Jan 19, 2026
43
10
18
Alberta Canada
Jul 25, 2026
#7
  • Jul 25, 2026
  • #7
No, but thanks for the info i certainly will try that.
 
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