Question about 2003 Toyota Avalon

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Took my 03 Toyota Avalon to my trusted mechanic yesterday to diagnose check engine light. Traced and found faulty sensor part which had to be ordered from Toyota. Actual part was shown to me and left off of vehicle. Tech said it was okay to drive until part arrived in two days. Fuel tank level was at or below 1/4. Drove errands and home, no problems. Last evening, fuel light came on, so I stopped for gas. Refueled tank completely (full tank). As I was parking in my garage, smelled odor of gasoline. Approx 20 minutes later, gasoline smell very strong in my house and almost unbearable in garage. Looked under my car to see a gasoline leak on the garage floor! backed car out of garage onto driveway and left it there for the night. Of course, my very trusted mechanic doesn't have Sunday hours! Could leaving the part off of the vehicle combined with filling the tank to full be causing the leak? Perhaps if the sensor were attached to the tank directly and leaving it off left an open hole in the top of the tank, which previously wasn't full? Trying to avoid a Sunday dealership visit.

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  • hebert523 Nov 15, 2010

    That picture looks similar. The part had a squared electronic connection/plug on top of a L shaped tube. In the pic you supplied, I don't see the tubes. But was told it was a sensor, just don't remember the exact name. Due to physical restrictions, I cannot get under the car. But drove around for several hours today to bring the fuel level down. I am smelling gas much less when at stoplights and no longer see a puddle under the car when it is parked for an extended time. Appreciate your assistance!

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  • Master
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Not exactly sure what sensor has been removed but if there was no leak before and now there is, I would highly suggest that this might be the problem........I know that you trust him and I dont ever want to second guess nother mechanic who is hardworking and just trying to earn a living...but I am unsure and hesitant that a sensor that was placed into/on the vehicle by the manufacturer would be able to be left off..........

So, at this point in time equipped with the information, I would suggest to get the vehilce outside, wet underneath the vehciel so the fuel does not accumulate, do not start the car but push/roll it out of the garage if possible, and jack up the car and plug the leak with whatever means you have available to you, as it could be a flammable/dangerous situation that you find yourself in !!!!!!!!!!!!!!!

Posted on Nov 15, 2010

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  • Toyota Master
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If the part was the fuel tank pressure sensor, he probably didn't plug the line after taking it off. Did it look like the part below? If yes, what is happening is a little gas is getting out by sloshing. It will not be much; but if you want to stop it, get under there with a golf tee and find the hose the gas is dripping from. Shove the tee in the hose as far as you can with your thumb. If the tee is too small, find a bolt or something a little bigger to use instead. Let your mechanic worry about how to get it out later. Let me know if this isn't it or you have more questions.

Took my 03 Toyota Avalon - jturcotte_20.jpg

Posted on Nov 14, 2010

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