My viper remote from 2001 just flashes rapidly when I press it & does not do anything.

notify viper for assistance camary programming system wont pair with viper fob

Getting stuck in valet mode is so annoying, but it really IS possible to reset the Security Unit (SU). Though not mentioned how in the Owner's Manual (OM), it is possible to set Programming Mode (PM) while in valet mode, even if you have lost or replaced the remote. See the OM about switching from LOCK-ON-LOCK 10 times. It takes some practice, but the horn will beep when you are in PM, at which point you can reset your (old or new) remote.

See https://pixcl.com/2005-2008-subaru-forester-stuck-in-valet-mode/ for more detailed info.

Some of those cars did not have that option on them. You must frist open the drivers door. then press the lock button on the main switch oin the door. Then close the door and slowly insert the key 6 times within 10 seconds but do not go to fast and when the flashers blink then turn the key to the ACC potion and press one of the buttons on the remote.

was it a professional or shade tree install? the following is off vipers website:
disarming without a remote control
This feature allows you to disarm the security system without the
Remote Control should it be lost, damaged, or disabled. In order to
disarm the system without a remote remote control, you must have
the vehicle’s ignition key and know where the Valet button is
located. Be sure to check with the installer for the location and the
number of presses of the Valet button required to disarm the system.
To disarm the security system,
turn the ignition to the ON position.
Press the Valet button the
preset number of times (one to
five times) within 15 seconds. After five seconds the system will
disarm. If the system does not disarm, you may have waited too long;
turn the ignition off and on and try again.
if that doesn't work try this other

valet mode
You can prevent your security system from automatically arming
and triggering by using Valet Mode. This is very useful when
washing the vehicle or having it serviced. In Valet Mode, the
security system will not arm, even with the Remote Control, but
all convenience functions (door locks, trunk release, etc.) will
continue to work normally.
To enter or exit Valet Mode:
1. Turn the ignition on.
2. Turn the ignition off.
3. Press and release the Valet
button within 10 seconds.
The status LED will light solidly if you are entering Valet Mode,
and it will go out if you are exiting Valet Mode.

Hope this a Homelink. Put new batt in garage door remote. Park outside garage. #(1) Press & hold 2 outer buttons on Homelink. Release ONLY after light starts to flash. Don't hold for longer than 30 sec. Don't repeat to program the other 2. #(2) Hold the remote 3 inches from Homelink. #(3) Press & hold the Homelink buttom & the remote button at the same time. #(4)The Homelink will begin to flash slowly then rapidly. After the Homelink flashes rapidly release the buttoms. #(5) Press the just trained Homelink button if the light stays on constantly, programming is complete..... To program the other 2 links DO NOT REPEAT #1

Look for alarm Brain box and look for wires coming out black and red going to valet switch. to turn valet on turn ignition in ON position and press-switch or flip depending on the type of switch. If it a basic alarm just disconnect the main wiring harness to alarm box- unplug and the car should start. Good luck and thanks for using FIX YA

Look for a push button under the dash, should be black, turn key on and hit button.. should go into "valet mode".. hopefully you will be all set...

You need to first look under the drivers side dash area near the hood release/fuse panel area and see if there is a valet switch. The switch will look like a little toggle or a push switch. After you locate it, turn the ignition switch to the on position(dont start it) and flick the valet to the opposite position it is in now. If done correctly in most cases the red system light will stay a constant instead of off or blinking indicating you are in valet mode. Next try to start the engine. If this doesnt work you need to remove the alarm system and repair the ignition switch wiring or replace the electrical portion of the ignition switch. The aftermarket alarm cuts into the ignition switch wires and bypasses the start circuit through the alarm module. When disarmed the alarm completes the circuit and allows the car to start. Good luck hope this helps and please rate this.

i read this on the subaru tech bulletin page
i had the same problem - apparently i had inadvertently put the system into "valet" mode
to get back to normal, unlock with remote - open drivers door - hold down the unlock button on your remote for 2-3 sec - the flashing light will go out and your system should be back to normal
it's too bad the manual doesn't supply information about activating and deactivating "valet" mode
good luck