It varies from c (ar to car...some cars will silence the auto alarm when a key is used to open the door, or to start the engine.
But as far as I can remember with my 95 Saab 900SE Convertible...the alarm would be turned on when you used the remote fob to auto-lock the doors, and would disarm itself when you used the remote fob to auto-unlock the doors.
If you locked the car with the fob, and then unlocked it with the key instead of the remote, the alarm would NOT be disarmed, and would go off! (That is, would literally "sound the alarm".) The only way I ever found to turn it off was to use the key fob again. I do NOT know what you would do if you locked it with the fob and then the fob was lost or broke or had its battery die.
I had purchased the car used...the previous owner had told me there was no other way to turn off the alarm other than using the fob...but I never investigated it any deeper.
Never
You can unlock the car with the remote or with the key in a door to shut off the factory alarm.
Insert the ignition key into the ignition and turn it to on, the alarm should shut off.
Insert the correct key into the ignition switch and start the engine. That should shut the alarm off.
If a person uses a key to unlock an alarmed vehicle, the alarm can be turned off on the 2000 Honda Civic LX by starting the car and putting it in gear. Then, put the car in park and shut the car off. Start the car again and the alarm should go off.
The alarm
The alarm itself is on the driver side of the car, close to the firewall. Just take the silly thing out if you can.
the car alarm will allow the car to start and run briefly then "shut down".
If your alarm keeps sounding after the car is locked then there must be a fault. Try making sure all the vents are shut in the car and try it, other than that i rekon it should still be under warranty. Take it back to dealer. hope this helps
Viper Car Alarms will also shut the engine down.
Unlock and lock your driver side door and see if the alarm is reset!
If you just want to shut off the alarm pull the wire off the sensor at the oil filter housing and ground it to the engine, this will silence the alarm but not fix your oil pressure issue.