Question about 2004 Toyota Sequoia

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I have problem with my 2004 toyota sequoia,Truck runnig so far no problem, but VSC TRAC, VSC OFF & Engine Check lights are ON Can you identify the problem...? Thanks

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I just encountered the same problem 2 days ago. I read a blog that said to check the gas cap to make sure it was fully tightened. (I know, seems weird that would be associated to traction and stability control sensors) So I removed, then re-tightened the gas cap, unhooked the battery for 10min and no more check engine/vsc/trac light. 2 days later, they reappear. I took it to Autozone where they will do a free code scanner of your vehicle's computer and these are the potential problems that it detected:

open or short circuit condition
poor electrical connection
failed oxygen sensor
EFI relay fault

Will probably have to take it in somewhere because there are 4 O2 sensors and I am not quite sure on what to do with the rest of the list.

Posted on Oct 11, 2010

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I had the same problem with my 2004 Sequoia which was driving me crazy so after some reading on-line I removed the sensors from each tire (10mm socket), cleaned them and re-installed them. For some reason the rear driver side sensor was extremely dirty while the front ones were kinda clean. After doing this I disconnected the battery for about 30-45 min., reconnected the battery and the lights remained off for about 4 days. After they reappeared I took the vehicle to Autozone where they told me it was the 02 sensor...being kinda skeptical, I checked all of the fluids (the brake fluid was low) and refilled them. Did some driving and in about a day the lights went out on their own and haven't turned on again. They turned off when I was backing up to my driveway which is on a hill... Before going to the dealer and having your computer switched for a price of 1-2k, I would checked all of the fluids (esp. brake), remove and clean all of the tire sensors, disconnect the battery for about 40+ minutes and see if it works. The lights may turn on but allow it to run for about a day or two before going to the dealer.. Hope this help. Ohh, when reinstalling the sensors, make sure not to apply too much pressure as you may damage the housing.. I'm not sure on the torch but just know that if you damage them it will cost you some money to replace/repair. Good luck..

Posted on Feb 11, 2013

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