Recently I changed the headlight bulbs on my 2005 Accord EX V6 Auto sedan to the Sylvania Silverstarr brand. They sure make a big difference compared to OEM. Anyways, in order to change the driver side bulb I had to disconnect and remove the battery so I can get at the bulb. Since then, I noticed that anytime I accelarate hard aka RPMs exceed 5k, the check engine light flashes for a while then goes away. It has happened twice so far. I am aware that when you disconnect the battery, the car's computer takes time to reset. Is this normal, or do I need to take it to a mechanic to find out if there is a malfunction? Otherwise, the car runs great. If I dont accelerate like a maniac, the check engine light does not come at all. Any thoughts anyone?

Thanks

 

ramdom multiple misfire would be my very first guess. check all of your wiring....

 

if less than 36k miles, car is still under warranty, take it to the local Honda dealer and have them chk it out

 

Car has over 43k on it, but I do have a extended Honda Care Warranty till 100K. I will have it checked out at the local dealer.

Thanks

 

I finally got around to taking the Accord to the dealer. I have warranty that covers me. The dealer found fault code P0301 "Small carbon crack on the #1 sparl plug causing a misfire". Dealer changed the plug, picked car, and guess what??? Check engine light on again if I were to drive it hard. Taking it back tom. Anyone else have similar problem like this?

 

sorry never seen that one.i have an 04 ex coupe,and ive had my check engine light come on a few times.its been a real pain in the neck

 

Right; it could be a wire in the trunk lid.
[sm=icon_rofl.gif]

 

I took it back. The technician pulled the coil for number 1 cylinder and put it on number 5 cylinder. Cylinder 5 came up in check engine light. Dealer replaced coil and car runs fine. Problem solved at zero out of pocket for me.