96 Buick Century can't pass imisions code P1441

Check this video John. Front Turn Signal Change Buick Century 1997 2005 1999 Buick Century...

• P0480 BUICK
  Refers to "Cooling Fan Relay Control Circuit"

Check for broken wires in the door jamb of the drivers door. You will have to **** the rubber boot which the wires pass through to gain access. This was a very common problem for those vehicles, and there is probably more than one wire broken.

The radio in my 1996 Buick century had a clock light that did not go off when the car was shut off, so the battery would go dead after 2 days. Disconnected the radio and all was well. Getting ready for a new radio now.

It refers to the evaporative emissions canister and a problem of maintaining a certain level of vacuum in the fuel tank

I spent endless time on this same problem on my 1992 Wagon. I changed out the computer but no help. It turned out to be the top dead center crank sensor that tells the system when the crank passes TDC. It is a small magnet essentially about the siz of a pencil eraser in the flywheel. it was cracked and occasionally would not "sense" and the car would just quit. troubleshooting was a nightmare because the computer diagnostics on the 1992 are less capable than the 1996 model. Anyway that is a relatively inexpensive fix and easy to know if it worked. Let me know how you solve this.

LT

P0440 is a EVAP leak detected, try changing the gas cap and reseting the ECM to clear the service engine light. If you can not clear the code it takes about three start up with out any issues to clear the code and after 100 start up's the codes will clear from the ECM's history. Note use the GM OEM gas cap for a replacement, anything else is just garbage and you'll be replacing it again with in 6 months. If it's not the gas cap, need to take it to a garage and have them do a smoke test to locate the leak in the system. Good luck and hope this helps, keep me posted. be glad to help

Check fuel pressure regulator

code is evap system flow during non-purge
check the hoses for holes or broken disconnected hoses also check the fuel cap emissions diagram under the hood will give u the location of the evep purge solenoid if all checks ok then replace the soienoid and clear the codes
rank & vote my solution

Replace spark plugs and wires. If thats not it, its your intake gasket. Mine did the same thing. I am working on putting my third intake gasket in my buick. 137740 miles