2004 Toyota Sienna Chech engine light

Tiny
JULIAKAYS
  • MEMBER
  • 2004 TOYOTA SIENNA
Engine Mechanical problem
2004 Toyota Sienna 4 cyl Front Wheel Drive Automatic 38k miles

I have a 2004 Toyota Sienna LE with about 38k miles on it. This afternoon, the check engine light came on. Of course the dealership wants $90 to diagnose the problem and them being a dealership, I'm sure they will find something wrong with the car which will cost a pretty penny to fix and probably won't fix the problem I came in for.

I checked the gas cap which was on tightly and I popped the hood. I don't know how or why but the engine cap was off and all the way on the left side of the car. Unbelievable. The last time I had an oil change was back in February and we haven't been under the hood since so I don't know if the cap has been off this whole time.

Can it really be as simple as a cap that isn't on?

Thanks in advance!
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Tuesday, April 20th, 2010 AT 4:37 PM

1 Reply

Tiny
KHLOW2008
  • MECHANIC
  • 41,815 POSTS
Hi Juliakays,

It is possible for the problem to be caused by the oil cap as it would affect the blowby system.

Get a free scan done at Autozone and let me know the exact trouble codes if the CEL keeps coming on after reinstalling the oil cap.
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Sunday, April 25th, 2010 AT 5:59 AM

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