Question about 1997 Lexus ES 300

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My check engine light keeps on coming on and i had it senser change two time already. I have a Lexus es300 1997

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Befor u buy car over--scan it at a parts place--a common problem is 02 sensors but vacuum leaks dont show on a readout-causin it to run lean putting lite on

Posted on Sep 02, 2010

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Had new tires put on car yesterday and traction control and engine check light have come on today on 1999 lexus es300


Any time the check engine light comes on the traction control will be disabled and the light will also come on. Start with scanning the engine computer for trouble codes to see why the check engine light is on.

Sep 20, 2012 | 1999 Lexus ES 300

1 Answer

How do I change the egr valve and is there anything else that needs to be done in conjunction to keep the check engine light from coming back on?


the valve seldom fails. The lines that are connected to it fill with carbon and the valve opens and flow of exhaust doesn't happen. The senser is in the egr tube and it fails more the the valve even clogging up. EXUP senser, has two vacume lines and a 3 wire electrical connecter. The hoses break and come off the tube they connect wo gets clogged, hook a piece of hose to each one and blow though, shoulld blow easy. if bothe lines blow though easy and the hoses are good, the car is running smoothly at idel and the check engine light can be reset and drive the car and the light comes back on and has the same code but runs smoothly all the time replace the senser reset the computer and away you go

Jun 01, 2010 | 2001 Ford Explorer Sport

1 Answer

Engine check light keeps coming on and it is rubbish on diesel i have changed diesel filter air filter oil oil filter new temp senser


is it the service engine light or the check engine light that is yellow?and how is it running does it seem normal? and have you checked the transmission fluid?

Apr 20, 2010 | 1997 Land Rover Discovery

1 Answer

This Summer Engine hesitation during warm up. Fine after warm


Your right ! The coolant temperture senser is ( bent ) Lying to the computer to the real temperture of the coolant. mixture wrong and it runs bad till warmed up. Senser is cheap and easy to install. it won't code the check engine light unless it goes plumb open or shorted and doesnt happen too much. newer cars and trucks they fixed this and the newer computers conpare the air charge temperture senser, the coolant tenperture senser, the ambiant temperture senser and the interior temperture senser and it knows how long its beenoff and the newer ones still even know that time it is and gat to know its running pattern if it has one. So it tunes its self to the finest end for your pattern and remembers it. Some thing doesn't seen right and someone of these doesnt make sense it goes on its patteren and runs just fine guessing whitch sensers to believe and which to take with a grain of salt. It does it a few times too many it remembers which senser is the lyer dis regards it and turns the check engine light on uses the rest of the good sensers to run on and goes on its merry way telling you to take me to your dealer to get another car or be fixed. They hope you'll get another car so they can soak you again fixs your old one and make a ton trashing it so the government can pay them a bonus to get you in there to keep the ecomomy moving

Aug 12, 2009 | 1995 Ford F150 Styleside Regular Cab

1 Answer

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.

May 27, 2009 | 1992 Lexus LS

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