01 Civic non-Vtech 60K miles and it's got a misfire at idle. I've replaced all the spark plugs and I've got the following codes P1298, P0303, P0304, P0300. The last 3 look like misfire on 3 and 4 and a random cylinder misfire, but I have no idea what the P1298 is and I don't really know where to start to fix this problem. Any ideas?

 

P1298 Electric Load Detector (ELD) Circuit Low Voltage
P0303 Number 3 Cylinder Misfire
P0304 Number 4 Cylinder Misfire
P0300 Random Misfire

http://www.tegger.com/hondafaq/error_codes.html

 

Nice so should I start with replacing the coil pack on number 3 and 4 or look at something else?

 

dot buy new coils switch the problem cylinders coil with a different one and see if ts misfireing in that cylider if it stays on the same one then its not the coil, after that do a compression test if its low the you got belt valves

 

i had this same problem...replaced the coils and plugs...next thing i knew i had a blown head gasket...

 

I cleared the codes and now it's coming back with all the same codes plus P0301 for cylinder 1 misfire. I know all 3 coils can't be going out at 60K miles.

 

If your getting an ELD code try checking it out... It's tied in with alot of things... I sound like an idiot, worth an investigation though,I dunno... *walks out of thread*

 

I've had the misfire codes on 1-3 along with random misfires. I replaced the spark plugs and it eventually went away.

My problem seems to happen ONLY during cold weather. It happened last winter and recently when I left my car outside overnight.