Last post on May 13, 2013 at 12:52 PM
You are in the Toyota Sienna
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Toyota Sienna, Van
#2 of 126 2004 sienna check engine light
Dec 01, 2006 (10:26 pm)
The last time we got gas in NJ, the attendant did not close the gas cap properly and the check engine light went on. We have now tightened the gas cap and the light is still on. It appears we have to take the van to the dealer to get it checked up could cost 75 dollars or more. Seems like a steep price for silly mistake of a loose gas cap. The van has about 40,000 miles and any ideas on what the problem could be. I would especially like to know if any of these would still be covered by warranty. Just curious.
#3 of 126 Re: 2004 sienna check engine light [gsnagesh]
Dec 02, 2006 (12:55 am)
When this happened on my Lexus I was told it could take several days and even a tank of gas to clear the check engine light after I didn't tighten the cap one time.
#4 of 126 Re: 2004 sienna check engine light [avery1]
Dec 02, 2006 (11:24 am)
It will take several drive cycles to clear a CEL caused by a loose or malfunctioning gas cap. Or you can disconnect the battery for ~5 minutes. But if you do the latter don't take it for an emissions test until several drive cycles have elapsed.
#5 of 126 Re: 2004 sienna check engine light [gsnagesh]
Dec 11, 2006 (6:55 pm)
Thanks for everyone who responded. It did turn out to be the loose gas cap code "P0440" or something. This time the dealer did not charge me anything, but somehow I get the feeling he will not be as nice the next time. So we will be double careful every time we get gas.
#6 of 126 Re: 2004 sienna check engine light [gsnagesh]
Dec 12, 2006 (8:26 am)
I think it's about time that the engine's computer should get things right. I mean, with all the advanced technology today, can't we have a dedicated "loose gas cap" light on the dashboard? and if the "Check Engine" light is the only way to go, can't it come off right after tightening the cap? why should one wait so much time until the computer "resets" itself? Isn't that rediciolus?
#7 of 126 Re: 2004 sienna check engine light [samnoe]
Dec 12, 2006 (8:33 am)
We can thank our government for that.
ODBII requires the idiot light because they want people to go to the dealership to fix it, since it might affect emissions.
They basically assume the vehicle owner is not smart enough or ethical enough to do the right thing and fix it.
#8 of 126 Re: 2004 sienna check engine light [ateixeira]
Dec 12, 2006 (11:41 am)
I heard that the new model Siennas have a seperate "loose gas cap" indicator light, but I have not personally confirmed that.
#9 of 126 Re: 2004 sienna check engine light [gsnagesh]
Dec 12, 2006 (3:59 pm)
There is a lose or improperly tightened cap indicator light on the 2006 Sienna Limited. A malfunction light illuminates on the dash. After properly tightening the fuel cap the malfunction light may not go out until after several trips. There is also an indicator that tells you on which side of the car the gas cap is. If the gas cap door is open the left sliding door to the Sienna will not open. If it did it of course could damage the cover.
#10 of 126 Re: 2004 sienna check engine light [gsnagesh]
Jan 18, 2007 (6:46 pm)
I just had this problem after re-installing battery on my 2005 Sienna AWD. The good thing is that the dealer didn't charge me anything for it; the bad thing was that I had to use the tow service as the VSC light came on with the check engine light. With VSC on, the car won't go more than a few miles per hour.
I was looking for information on this forum; thought I share the result here.