Code p 0411 refers to secondary air injection (AIR) system---incorrect flow detected ===causes --AIR pump---AIR valve --- AIR hoses
code p 0449 refers to evaporative emission (EVAP) cannister purge valve , vent valve --circuit malfunction===causes ---wiring---EVAP cannister purge valve ---ECM
code p 0455 refers to EVAP system --large leak detected ===causes hose connections --intake leak---EVAP cannister ---EVAP cannister purge valve --- loose /missing filler cap
Your best bet take it to a qualified repair shop . It takes special tool's to diagnose evaporative emission system's .
DTC P0411 : Secondary Air Injection (AIR) System Incorrect Air Flow Detected
DTC P0449: Evaporative Emission (EVAP) Vent Solenoid Control Circuit
DTC P0455: Evaporative Emission (EVAP) System Large Leak
SOURCE: 2006 Suburban-
It may need a gas cap, and if you do make sure you get it from the dealer. Not all caps sold on the aftermarket are right for your truck. The code that sets is "evap small leak detected" and while the cap is the most common cause on newer cars, all it takes is a tiny crack in a hose to let the air into the closed system. Replacing a 4 year old cap is the easiest, but if it comes back you will need to find a shop that has a smoke machine. There is a port on the system you hook up to and pumps smoke at very low pressure into the closed system and you follow all the lines until you see smoke coming out of the leak. It is work the cost to have it diagnosed because you cannot find the leak with out the machine and the repair is generally nominal in cost. In most states it will not pass inspection with this light on.
Hope this helps
Rich
SOURCE: 2006 Saturn Relay Check Engine Light
PO455 is a large evaporative fuel leak. A bad fuel cap is ONE of the things that COULD be the problem. Fuel system cleaning only lightened your wallet. Reading your post is confusing. Did all this start AFTER the Valvoline Wallet Flushing? If so , they left something loose or disconnected. I would find a qualified repair shop to fix the problem, and if it has anything to do with what Valvoline did, make them pay the bill.
SOURCE: check engine light came on the day after refueling
Did you refuel while leaving the engine running? Have OBD scan done before light resets. Temporary errors are cancelled after a number of start cycles.
SOURCE: 2006 Ford Fusion 2.3L I4 Engine Check engine light
Common Problems That Trigger the P0455 Code
Common Misdiagnoses
This is a link to a Ford Motor Company PDF file that explains this fault in great detail and is worth reading and studying.
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http://www.motorcraftservice.com/vdirs/diagnostics/pdf/OBDSM601.pdf
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