I have a 99 ls400, not sure what's going on with keyless entry, sometime it work and at time when I push to open or lock it does nit work, not sure if there is a common thing I should be looking for to fix this problem. I tried with both keys and still same problem. Anyone have any idea?

 

check the batteries?

 

check this link to see how I fixed mine.
https://www.clublexus.com/forums/ls4...t-working.html

 

it is the batteries, change and its perfect now, thanks guys