The check engine light is permanently on and 4LO has been blinking on my 2011 Lexus 460

SOURCE: I have a lexus Lx470.

There is NO button to turn off. You need to have the codes scanned and reset, Something triggered a fault and lights came on. Lexus can do it and any good shop can read the codes and reset your lights.

SOURCE: Lexus ES 300

Unscrew the gas cap, wait 30 sec and screw it back on making 3 clicks/cracks. Should be ok in a day or two.

SOURCE: check engine lights came on,

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.

SOURCE: 1994 lexus ls 400 problem with dash board light

Try rotating the ignition switch slightly after you turn it to on and see if the lights come on...had the same problem and changed the switch fixed the problem...

Dale Farr

• 78 Answers
• Posted on Mar 17, 2009

SOURCE: 96 lexus es 300 blinking check engine light

Hi there;

#4 Miss-fire. All the things you are saying make a lot of sense. When the light is blinking the cylinder is actualy misfiring, & the smell you are smelling is the fuel that is not burning in the engine burning in the exahst. This can cause a lot of damage to the exausht if it is not repaired..
There is still a couple of things that need to be checked, first he needs to check to see if it is possibly a fuel injector that is sticking. He can do this easily by moving the #4 injector to another cylinder & run the car. When it starts missfiring he will need to see if it is still #4 or if it is the cylinder that he moved the injector to. if it is the new cylinder it is obviously the injector, if it is still #4 he will need to look into the possibility of the EGR valve sticking open or some other issue to do with valve timing or low compression.
I hope this helps
Farrout!