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29 psi is ok if the tires were totally cold when you put air in them . in colder climates during the winter months you may want to put the pressure up to 32psi on cold tires.
turn the ignition on and then hold the button in until it begins to flash once it stops flashing start the car and see if the light goes off.
if the light remains on solid i would recheck the tire psi and then do the reset again.
let me know if you need further info on this
if you read your post you stated you topped all tires to 29 psi and you didnt have a reset switch. i showed you where to locate the switch and how to reset it.
sorry that when you said you topped of all tires that i assumed all was all 5 tires and that all to meant 4 of the 5 tires.