Re: Check engine light came up today
Looking at 4-10sec the rattle seems to be in sync with the AC clutch.
I really do not understand why people who spend thousands of dollars on a car, will not spend either $20 or $60 on being able to read/clear codes. In mine my cell phone is clamped to the dash and provided an extension of the instruments with a digital display of coolant temp and voltage.
If you have an android phone or tab then you just need an OBD-II mini dongle ($12) and the Torque Pro app ($5).
If not you will also need an inexpensve Android tab with BlueTooth (7"-$40). More if you want a real GPS so MAPS works.
And that is it. Can read values and codes in any car since 1996.
Then download the '05 service manual from the archive here and you have an index to the trouble codes.
Make life much easier.