Lexus Troubleshooting Questions? Ask a Lexus Expert
may seem like a silly question but you have your foot on the brake while trying to start correct. also what year is your IS
ok sorry my internet fell out for a bit i apologize. to be honest this is an issue i have seen with toyotas push start system for a while now. if this is an issue for you i would recommend taking your vehicle to the dealer and having them diagnose it from their point. the problem is if it is not currently having an issue at the time of their diag then they will come back and say nothing is wrong. my own tacoma which is a 2016 has had this happen a couple of times. if there is to much radio interference at the time it can interfere with the car picking up the signal from the key fob.
yeah it is most likely either a fob issue or the reciever in the car. i would not consider the engine to be having an issue.