I would start by cleaning the mass air flow valve by spraying a non-chlronated brake to the inside of it cleaning the small wires inside of it then let it dry for 10-15 minutes before re-installing.If the problem still exist then check the fuel pressure and make sure its within its specs.If its not within the specs then replace the fuel pump.
SOURCE: 92 lexus ls 400 check engine and traction control light came on at the same time, 92 lexus ls 400.
the track off light will come everytime yhe check engine light comes on. this is normal. you need to have the check engine light checked first.you can go to your local parts house they will scan it for so you at least see what area you problem is in and then you can start from there. let me know lf you find out youe engine codes.
SOURCE: 1997 Lexus LS 400 Fuel Filter location
The fuel filter is located under the vehicle on the left side before the rear axle.
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...
SOURCE: DASHBOARD LIGHTS OUT ON 1994 LS400 LEXUS
check ur fuels thats usually the problem and its very in expensive
SOURCE: Fuse Box ( cover) diagram for a 95 Lexus LS 400 is missing.
check the wiring harness beside the hinge that moves when you close the trunk.i have seen the wiring get pinched and the ground gets broken. the tail lights have separate left and right side fuses.get a test light,and with the ignition in the on position,there should be power on both sides of all the fuses.the atc type have little test pins on them.ground the test light and put the tip on the fuse.if there is power,the light will come on. if a fuse does not light up the light on both sides,it is open.since the fuses are see thru,it is apparent if it is blown as the metal inside will be burnt.
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