the dash beside the start button for about ten seconds. Watch to see if the green light comes on. Then try the button. If it fails try your spare key same way. You likely have a low battery in the fob
How do you start the car if the battery is dead in the keyless fob? I would say replace the battery. Then I would get a spare FOB and a spare battery.
key fob not detected check and replace battery in the key fob.
Question about 2007 ES 350
...fob battery,now nothing works. Only immobilizer security light is flashing and engine start stop button has amber colored light on My lexus will not repond to anything. Can only open door with key. ...
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