.fb-login-button.fb_iframe_widget.fb_hide_iframes span {display:none;}
  • Register
Get upfront auto repair quotes from reputable shops in your area | AutoCodes.com Local
Need Auto Repairs?
Get a Free Quote
Get upfront auto repair quotes from reputable shops in your area.
AutoCodes.com Marketplace

37,246 questions

23,771 answers

1,026 comments

24,280 users

Top Users

Reynaldo 10,675 Points
Carguy1 6,470 Points
G37driver 3,517 Points
OBDIITech 2,792 Points
OBDtech2 165 Points
corvette-78 127 Points
knowledge 1488 124 Points
Lemuel Alfaro 119 Points
Samat Bekov 117 Points
ptl 113 Points

P0300 Chevrolet -

I have code p0300 and code p0496 2004 suburban 8.1L

Vehicle: 2004 chevy suburban 2500 8.1
asked Nov 6, 2013 by chad weiser

1 Answer

P0300 Random misfire

P0496 EVAP emission high purge flow fault

Having a random misfire do come from false air such as vacuum leaks,low fuel pressure or excessive back pressure,But with P0496 this can cause random misfire check and inspect the purge line for proper hose connection. The open purge flow may be the cause of random misfire

answered Nov 7, 2013 by Reynaldo (10,675 points)
I have an 03 chevy venture and P0300 and P0449 are coming up it is running rough, really bad rough, spitting and sputtering so bad that you cannot drive it any more and it will stall out. We changed the canister vent valve solenoid thats on top of the gas tank, but then i found out about the purge valve thats on top of the motor. But i get different answers from every person I talk to, some say a bad purge valve/vent valve will cause random misfire and some say  it will not, and i cant get a clear answer on line either. The only symptoms it says is the check engine light will be one.

Related questions

1 answer
269 views asked Oct 6, 2013 by anonymous
1 answer
0 answers
Home - Home - For Shop Owners - About AutoCodes.com - Privacy Policy - Terms and Conditions - AutoCodes.com Feedback - Copyright 2010-2017 AutoCodes.com

AutoCodes.com - HelpForCars.net - Infinitihelp.com - Nissanhelp.com
...