Is there a manual way to read the engine codes for a 1992 Lexus es300

look in the manual or at the sides of your door, there is an sticker witha lot of numbers, im not sure if its at the door but that sticker must be at any place of the passenger side or on the car.

the sticker has a lot of numbers, there are all the codes of the car

look at your manual or at lexus dealership, even if your car its not new they know which its the code

hope this help you

on many cars.if you turn the ignition key..on.off..on..off..on..the check engine light will flash in a sequence of flashes..there will be a brief pause between 2 digit codes...a longer pause between multiple code #'s