Question about 1997 Honda Civic
PO 441 -is an EVAP System problem
The Check Light tells you that your vehicle
has a system Malfuntion. Have it diagnosed
You can not do EVAP at home too well
Posted on May 23, 2011
Code PO441 indicates there's a problem with the Evap canister system. The canister traps fuel vapor while the key is in the off position. With the key on, and engine running the canister is connected to engine vacuum source, and the fuel fumes are burned in the engine, ie "Purged". If a code is set this system needs repair. The canister is equipped with a solenoid valve that is normally closed, (Key off), and open (key on, engine running) and this valve is triggered by the computer to collect unburned fuel vapor produced by evaporating fuel stored inside the fuel tank. Inspect vacuum lines and make sure vacuum is present at the canister solenoid, check to see if the solenoid has 12 volts and a good ground circuit. Also check solenoid for obstruction, ie not plugged by dirt or other material. Repair or replace any vacuum lines, or Solenoid valve if not operating as described, clean or replace filters if dirty or plugged.
This is simply a way to keep fuel vapor from being vented to atmosphere, and will not cause driveability issues, but it will illuminate the MIL light, and set a code.
Posted on Oct 09, 2014
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Posted on Jan 02, 2017
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