Question about 1999 Toyota Sienna

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Check engine abs and track off lights are all on after idel fails

My 2002 Sienna xle lights will go on after I am ideling for a minute or 2 then when I either turn it off or it automatically shuts off with power still on also. and will not restart without a jump. I usually have the a/c on when it tuns off by itself.
Also we have replaced the o2 sensor, checked the started and alternator which are good and also has a new battery only a week old. it did the same thing with the old battery.....
thanks T....

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  • tiffanylupia Jul 20, 2009

    wE REPLACED THE COOLANT SENSOR AND YESTERDAY ALL OF THE LIGHTS CAME ON AGAIN.
    IT IS ONLY WHEN I SIT AT A LIGHT OR PARKED WITH IT RUNNING AND THE A/C IS ON. THEN ALL OF THE LIGHTS COME ON AGAIN, BUT IF I HURRY UP AND TURN THE A/C OFF ALL OF THE LIGHTS WILL TURN OFF........

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It sounds like a very strange problem indeed. I am getting the feeling that your ECU is recieving bad data, Good job on replacing the O2 sensor thats where I wouldve started. Next I would check and replace the coolant tempature sensor as that is also a cheap but very common problem with vehichles and since you say that the problem occurs only after letting it run for a few minutes it is definately looking to be something in that area. I can't guarantee that the CTS is your problem but I can tell you that there is atleast one sensor that is not functioning properly and is giving faulty readings to the ECU. Start with the cheap and more common ones and work your way down the list. Or you could take it to an auto-zone and let them hook up the diag computer and see if it gives you any readings which im betting that it won't.

Posted on Jul 16, 2009

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