2001 corolla wont start with remote start or key . worked perfectly fine before i installed an amp

This one you may be stuck paying the 50 dollars but what I would do first is contact the manufacturer of the remote control. I would bet they will help you out. The other option is to go to an after market installer of car alarms that is a bit smaller. They will most likely help you in the hopes of you coming back for further business.

Disconnect battery again for 24 hrs to clear memory. try again if that doesnt work you may have an immobilizer problem

I’m happy to assist further over the phone at https://www.6ya.com/expert/howard_977676954994c5b2

needs initializing code reset

Hello, it most likely has an aftermarket alarm installed, most used car dealers either give you a remote or remove the system completely. try doing this:
with the key out remove the negativw battery cable
Put the key in and turn to ON
leave the door open
re connect the battery
try to start

place the remote on the start button to depress it,if it start,replace the remote battery.

have a chat with the dealer about this,I am not up to speed on these electronic theft systems..my fotay is the older cars and such..

Bryan, 1st check that the battery connections are clean and tight, and also the same for starter connections (starter is positioned between the engine and transmission, probably has 2-3 bolts and wiring connections. Have you had the battery tested? Don't buy a starter until you do. The lights and radio can work, but the battery could be undercharged enough to not be able to crank the engine over (you are correct that the 'clicking' sound is classic bad or low charge battery, but check the above 1st). A parts store can do a free check if you pull it out and bring it down. After checking the connections, try to jump start the car. Good luck. Hope this helps.

from outside the car make sure all doors a closed completely, make sure hood and trunk are also closed. lock the vehicle with the remote, unlock it and repeat, lock and unlock. if it still wont start, put the key in the driver door lock, lock and unlock the door three times with the key, then try to start.

it could be that he locked the car with the key and activated the car alarm try unlocking it with the remote and see if that works

yes, but if you dont understand how to remove the remote start wiring, dont have your mechanic take it out, mine charged me around 70 dollars to take it out