What are some of the Toyota Camry alarm system problems?

Some issues You may run into with Your Toyota Camry's alarm system is having it go off when You don't want it to, and not disarming itself when You do. One especially frustrating issue is when You try to use the remote and the system fails to recognize it. Sometimes the alarm system can also interfere with the functionality of the radio, if it's been disconnected from the battery. Here's how to address that: Insert Your key into the ignition and switch it to the ON position, but don't start the engine. Press the power button on Your stereo to power it up. Press and hold the UP radion station tune button, and then press and hold the 1 radio station preset button at the same time. You can release both buttons when You see "---" on the stereo's display. Now, press the numbered station preset buttons to enter the unlock code that You were given when You purchased Your Camry. Your stereo should be fixed, until the next time the anti-theft system halts it.