Hey guys,

I just was on my way home from getting an alignment done on my car and the check engine light came on. I decided to check it when I got home and I pulled the following codes:

0903 - EVAP Canister Vent Control Valve
0705 - EVAP Control System
0304 - Knock Sensor

I'm sure the knock sensor is related to the other two codes, but I'm not sure what the EVAP System is or what it does. Can someone tell me what to check or what I need to do to fix it? The car seems to be running OK, but the tachometer is "jumping" instead of just moving smoothly like normal, if that makes sense.

Also, right before I pulled in my driveway, the check engine light starting blinking. According to the owners manual, you shouldn't drive over 45mph, or carry heavy loads when that happens, so I'm starting to think this is serious!

Someone please HELP!
-Nick

 

bump...anyone? Please HELP!

-Nick

 

i had the same code...0903. i just cleaned the hoses attached to the can and reset the ecu. this was last year and so far so good. others have actually have taken the canister off, took it apart and cleaned it as well. the canister is behind a plastic cover in your right driverside wheelwell.

 

bump...anyone else have information on the EVAP system?

Thanks,
-Nick

 

So, I reset the light today, and took the car for a spin. The tachometer was acting normally again and the light never came back on. I even checked the codes again and it gave me 0505, no problem detected. For now, I'm gonna hope it doesn't come back on. If it does, then I'm gonna have to look into replacing that valve, but I can't figure out what is wrong with it. It looks fine. I have a feeling the light will come back on though because the tachometer just was doing the jumping thing again a few minutes ago when I ran an errand.

-Nick