Question about 2000 Lexus ES 300

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Bad sensors on 2000 Lexus ES 300

My 2000 ES 300 has 93K miles on it. I have always done schedueld maintenenace very regularly. Recently I started having several problems related to sensors.
The break light indicator goes on and off randomly when I am driving. The local lexus dealer checked it out and said the break fluid level sensor is out and it costs $403 to replace it. The break fluid level is fine.
The check engine light and TRAC OFF light indicators used to go on and off randomly but they stay on always now. The dealer cheked this out and said Mass Airflow sensor is out and it costs $683 to fix it.
I have had other sensors related problems in the past and had them fixed. I asked the dealer to check the electrical system and see if there is a problem that is causing these sensors to go bad. He said he didn't find any problems with the electrical system.
My air conditioner also stopped working. It blows hot or warm air, just not cold. The dealer said he needs to replace the compressor and valves and other components that cost $2400. AC is fully charged and there is no leak.
Are this type of problems common for 2000 ES 300 with just 93k miles?
The prices for repairs seem to be very high compared to my previous repairs. Are these prices reasonable? Can I get these parts replaced from a Toyota dealer for less? Are there any less expensive options? Thanks

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  • bttrfly67 Jul 30, 2008

    Yes, I am having the exact same problems with my 2000 ES300 (130,000 miles)! Aside from the AC, the is. I see from your experience that repairs will be expensive...yikes! The car didn't start yesterday so I charged the battery, which seemed to help. However, this morning it didn't start. My assumption was that I need to replace the battery. After reading your message, I'm not so sure. I considered trading the vehicle a few months ago. I probably should have :-)

  • hewilliams20 Dec 17, 2008

    traction and check engine lite is and car runs rough. repair shop ordered two sensors. still waiting for parts. they are on back order. vehicle has 106,000 miles.

  • wjefflittle Dec 26, 2008

    My wife's aunt has the exact same problem with her 2000 lexus es 300. It has 90,000 miles on it. I have worked on it before for her for that problem. The first 3 times the check engine light came on, I troubleshot it down to a bad ignition coil each time. It has popped up again and I'm pretty sure it is another bad coil. There are three theories that I have on this. 1. The coils are bad from the factory, weather they are factory or aftermarket. 2. The first time it happened, I changed the spark plugs and wonder if I set the gap to the wrong gap size since I used aftermarket plugs. 3. The ECM computer or something else in the system is causing the coils to go bad.

    The trac light is also on and I told her she needs to take it to the dealership so they can put there computer on it and see what it is calling out. It is probably a bad sensor on one of the wheels.

    The brake light is also on to. I looked at the emergency brake pedal switch under the dash. I could not find anything wrong physically so I figure either the switch is bad or the switch on the brake master cylinder is bad.

    I find it mighty peculiar that there are 4 exact model and year cars out there with the exact same problems happening with 3 totally independent systems all at the same time. That makes me wonder if there is a tie between the systems that I don't know about. It cant be coincidence that this is happening. I think Lexus should look into this because there is a problem here.


  • lenrosenberg Jan 21, 2009




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It is not likely an electrical issue, just age and low mileage. A Toyota dealer can work on the car but the parts will cost the same. Ask if there is a rebuilt AC compressor to fit. Toyota labor will be less but not much. The under hood sensors do age and foul.Yours may be from to little driving at high speed I would try some really good injection cleaner, fuel system flush and a run with premium gas fro a few weeks. It may help. You may also have a dirty throttle valve in the intake area accessible by removing the snorkle beyond the air cleaner.
If the dealer has scoped this car with his equipment the diagnoses is likely accurate. Ask him to point out the defective sensor under the hood. Several area s easy to do as spark plugs. VERY visible.but when the delaer finsihes he will agin scope the car to check computer readouts.
The fluid sensor may be visible too. Ask at the parts desk to show you on a screen where this item is and if it can be a DIY fix....

Posted on Sep 11, 2009

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I have a 2000 ES300 with 160K on it. It blew 3 coils within the last year, all on the same cylinder #4. Any clues?

Posted on Jan 30, 2010


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