Hello. I have a question. I have an 04 Civic Lx and the Check Engine
Light came on. The car was driving perfect before it came on. It seems
like when the light is on, the car has issues switching gears. I am
pretty sure that the gas cap is on tightly. The light shut off for
about 10 minutes, and was driving fine, until the light went right back
on. Could there be something seriously wrong with the car? Or could
that light also indicate that the car needs maintanence?
I am a little over due for a tune-up. Can anyone help me out?
Tell us the mileage. Tell us when the tranny was last serviced, and by
whom. Tell us why you're suspicious. Tell us what you found when you did
all the under-hood checks (oil, rad, tranny, belts).
The only way to determine what is causing the problem is to read the codes
from the computer. It could and probably is serious and could be causing
further damage as you drive it. Take it to a good service garage or the
dealer and find out what is turning on the light. There are hundreds of
My 2004 turned two weeks ago, just before 30K service.
Some switch went bad whch they replaced under warranty.
I was initially told it would be $100 just diagnosis before I told
them the mileage.
You are right. I read there are 85 engine light codes for a 2004.
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