I just picked up a 2004 Civic manual. Bought it with 39,000 miles and now it has 49,000. Thus, it is fairly new. I think Honda makes really sound cars and so I would not expect problems with it already. Anyway, until the engine heats up, it idles at around 1600 rmp instead of what it use to do (about 750-800). Once the engine warms up, it idles where it should. Im guessing this is a minor problem, but I don't know what is causing it. In addition, around the same time the "Main Req'd" light went on. I'm not sure if these 2 things are related. Any thoughts why it may be acting this way. Thanks.

 

It's actually supposed to warm up that way, fi I understood you correctly. It supposed to start somewhere around 1500-2000 and gradually go down to normal as engine warms up.So whatever behavior you had before was incorrect, and now it just corrected itself. No need to worry right now, but if it returns to incorrect behavior you need to worry.

"Maint req'd" light (if you didn't mix it with"Check engine" light) has nothing to do with this and just lets you know that time comes to do the next maintenance.

 

to reset mant light press and hold ur trip button then turn key on hold button until the light flashes or goes off it comes on ever few thousand miles.

i did not know if u know how to reset it or not. only reason i know is from where i worked at honda shop.

 

It's actually printed in user manual LOL

 

didnt know, just tryin help out if i can. no one that ever came to the dealership knew how so i guess ppl dont read the manual

 

Or you could just use a key or pen and press in the button I circled.

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^ I don't think they have it this way on 2004, though...

 

my 1995 civic sir2 does that too, starts at 1500rpm and then settles to 800rpm when warmed up. i questioned it with my trusty mechanic (former head of local honda garage - gone independent) not worry about it though cause it's just a "cold start" mode

 

sh* mine idles at 2300 at start up when its cold