Want to know if anyone also had the same problem when installing sub and amp into factory head unit on a 05 TL. It was driving fine then when i parked then started back up the VSA and Check light turn on and i can't drive faster than 20mph. Anyone know what the problem might be? Thank you

 

Well I know my 05 acura has an anti theft radio which is basically designed to never come out of the car. There are alot of sensors and wires that go from the computer system to every part of the car. I would think something got damaged when you took it out.

They designed low-level converters so you technically would never need to take the factory head unit out of such cars when installing aftermarket sound systems.