How to install gas cap retention hanger 2006 Chrysler town and country

SOURCE: error codes 442 and 456 on 2003 Chrysler Town and Country

Could be the gas cap.  Do you fill the tank with the engine running?
Otherwise, check the hoses near the Evap canister.  I have 2003 T&C and had the small leak and large leak codes.  I looked at the evap cansiter and the hose coming from the fuel tank vapor line had a huge crack in it, to the point it had fallen off the evap caniser.  I trimmed the end of the hose and reconnected and voila, no codes.
The evap canister is on the driver's side of the van, underneath, slightly behind the drivers seat.
BTW, to clear the codes without an OBDII reader, remove the negative cable for 5-10 minutes (15 to be safe).  The computer resets and clears the codes, except for one that it sets saying loss of power to the memory.

SOURCE: Whirring sound after long drives 2006 Chrysler Town & Country

It is your power steering pump. The solution is to replace the P/S fluid resevoir and fill or flush the system.

SOURCE: 2002 Chrysler Town & Country Evaporator leak

THERE ARE SEVERAL EVAP HOSE LEAK SPOTS ON THESE VEHICLES..UNDER VEHICLE BY EVAP CANISTER,UNDER AIR CLEANER..ALSO LDP VENT VALVE NOT HOLDING VACUUM WILL SET A LEAK CODE..SMALL BLACK VALVE WITH A HOSE ON EACH END WITH A SMALL VACUUM HOSE ON TOP..IT SHOULD HOLD VACUUM WITH HAND HELD VACUUM PUMP..HAVE ALSO SEEN SPLIT HOSES NEAR EVAP SERVICE PORT LOCATED NEXT TO AIR CLEANER HOUSING

SOURCE: I have a 2004 Chrysler Town and Country and my

P0440:

• Broken or damaged EVAP line or canister
• Open in PCM purge command circuit
• Open or short in Voltage feed circuit to Purge Solenoid
• Faulty purge solenoid
• Restriction in EVAP solenoid, line or canister
• Corrosion or resistance in purge connector
• Bad PCM

SOURCE: code EGR P404

Or before shelling out that kind of cash; you could try cleaning the seal on your gas cap and/or replacing your gas cap first. My '06 has tripped this code twice (after very dry or very cold weather).