0440-Evaporative Emission System (EVAP)
0441-Evaporative Emission Control System Incorrect Purge Flow
2175-low airflow/restricted airflow

can anyone shed some light on these issues? Im going to clean the TB this weekend and see if that helps the low airflow code. Seems funny to pop a low airflow code when I have this bigass intake under my hood.

 

i think the evap might be the gas cap not closing all the way but im not sure...

 

your computer could be junk, your gas cap could be loose or you could have a leak in your fuel system. your intake could be clogged or dirty throttlebody?

 

I just tightened the gas cap a few rotations and reset the codes. I guess if it comes back there is actually something wrong. I wonder if this is causing my truck to go into limp mode while on road trips. The electronic throttle management light starts flashing at me so I usually just pull over and restart the truck then its back to normal. I always twist the gas cap until it clicks a few times after I fill up so im thinking it might be something else.

 

There's a better chance than not that the rubber hoses that are used in the evaporative emmisions are getting cracked, causing the codes. The charchol canister is under the drivers side of the truck up in the frame rails. If they are cracked at all, replace them. Standard type rubber vacuum hose works fine or you could upgrade to silicone.

 

Thanks for tip, ill check this weekend while im under there changing the oil. Ive got to travel close to a 1000 miles in the next week so im trying to get this stuff sorted out before hand.

 

Thats funny my engine light came on yesterday and i just pulled my codes.

I also got the 0441 and my OBD2 scanner program thing said this
Possible Causes:
EVAP purge solenoid vacuum line loose, leaking or restricted
EVAP purge solenoid stuck leaking, stuck open or stuck closed
EVAP purge vacuum line to canister leaking or disconnected
EVAP canister leaking, damaged or has failed

idk if that will help any, im trying to figure mine out now

 

try putting some grease around the gasket on the inside of the gascap if its not sealing good