Security light stays on in 99 maxima and wont start?

could be turn key forward dont bump starter wait for security light to go out then try to start if security light is not on check your starter and wires going to it the small one is most common but both go bad

Your crankshaft sensor doesn't always make the light blink. I'm almost positive it your crankshaft sensor.

go to your pass side door and with the battery connected and lock and unlock the car with the key till the alarm turns off from the pass side

IF YOU GOT 2 SETS OF KEYS TRY ANOTHER IGNITION KEY.THAT NOT WORN.TURN ON IGNITION FOR 5 SECONDS.SWITCH THE IGNITION OFF.WAIT APPROXIMATELY 5 SECONDS.SWITCH IGNITION ON FOR APPROXIMATELY 5 SECONDS.SWITCH IGNITION OFF.WAIT APPROXIMATELY 5 SECONDS.START ENGINE.IF STARTS OTHER KEY WAS WORN.IF CAR STILL DONT CRANK.THE DEALERSHIP HAS REPLACE KEYS AND ANTI THEFT SYSTEM AND REPROGRAM TO CRANK.ALSO CHECK TO MAKE SURE THE NEUTRAL START BACK UP LIGHT SWITCH IS WORKING.IF FAULTY IT WILL ALSO CAUSE NO START PROBLEMS.

The P0335 refers to the electrical circuit and not necessarily the sensor. Please see this article for full details - P0335.

buy a chevy or at least a ford!

battery is dead again let it charge longer then try it.
clean your cables and then have the alt and battery checked if they are both good then something is staying on like mine my brake lights stayed on once and killed the battery
good luck

get your key recoded

try putting the key in the trunck and poping it it should reset the security

how to get the security light off and to get my car off security so it will stay running