Toyota Key Fob Not Working After Battery Change
The buttons stay quiet after the cover is closed. The usual cell is a CR2032 in most smart keys, or a CR2016 in many older remote-head and flip keys.
Problems
Problems collects the faults that show up around a Toyota key cell. A fob that dies after a fresh cell, a warning that stays on, a button that locks but will not unlock, and a start button that only works when the fob touches it are separate cases. Heat, water, a swollen coin, and a cover that will not close are separate cases too. Read the page that matches the symptom you can see. The coin cell is not the 12-volt battery, and the immobilizer lamp is not a dead coin. A battery change does not program anything. If the right cell is seated and the fob is still dead, the next step is a dealer or a licensed locksmith for a failed fob, not a procedure this site will invent. Heat, a stuck button, a thicker cell forced into a thin shell, and a cover that will not snap are different pages because the fix is different.
Toyota Key Fob Low Battery Warning
The dash asks for a key battery while the buttons may still work. The stamp on the old cell wins. Match the shell in your hand before you buy.
Toyota Key Fob Only Works Up Close
You must stand at the door before the car hears a button. The stamp on the old cell wins. Match the shell in your hand before you buy.
Toyota Key Fob Locks but Will Not Unlock
Lock works. Unlock does not. The usual cell is a CR2032 in most smart keys, or a CR2016 in many older remote-head and flip keys.