4LO has been blinking and check engine permanently on,on my Lexus 2013 570,what can I do

there was a recall issued that said the ECM needed to be reflashed.
Contact a dealership service writer and have the VIN number handy. They will check to see if the recall work was ever done on your vehicle.
Although that recall was for the stability control, it's a possibility

can you get there list or a new read out and post it please.

possible bad contacts in wire connector

This is a warranty issue see the dealer, do not repair it yourself or touch the engine.

A constantly blinking check engine light means you have a misfiring engine that is bad enough to cause your catalytic converter to go bad! Take it to the shop... probably means ignition parts and the upper manifold has to come off... and that's no fun! Good luck.

Your best bet , take it to a qualified repair shop . Service 4X4 light's blinking . DTC'S - diagnostic trouble code's stored in the 4X4 control module.

might have a bad o2 sensor wich is tripping your check engine light and a vacuum leak wich is causing your 4lo 4 high light to blink

Change shift solenoid

If they are blinking I believe it means that there are fault codes present in the pcm. You need to get the computer scaned to see if there are an codes present. If you live near an Autozone or Checker autoparts they can scan it for free.