i have a 06 silverado 5.3, my superchips micro tuner is showing code po449,evap emissin ctrl sys vent valve solenoid circ error.what should i check for?Service engine light codes?
Check the 15 amp 4WS in your underhood fuse block for an open. If that fuse is good the chances (probably 90%) are you have a bad EVAP vent control solenoid. Should look like this picture below.
http://gsi.xw.gm.com/image_en_us/gif/000鈥?/a>
A bad or loose gas cap won't set this code. You actually need a Tech2 to actually command the vent on and off to properly diagnose the problem, but vent solenoids aren't super uncommon.Service engine light codes?
Are you noticing any difference in the operation of your vehicle? I know that *I* can't decipher code numbers via this media. Without any *clues* of "physical trouble signs" in the performance of the engine, transmission, steering, braking, etc., I don't think that anyone posting here can help you.Service engine light codes?
You will need to ck the wiring to the vent valve. You could have a vent valve bad. a bad connection or a control issue at the pcm. It's time to have a pro check it out. A loose Gas Cap will not set this code.
Check that your fuel cap is tight !
serious,it is common.
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