The EVAP Canister System is the system that purges the gas tank of most air in it, making it a vacuum and keeping the lines fairly void of anything but gas. Unfortunately, unless your going to be able to give all the codes from your check engine light andd remove the exhaust to get to the gas tank, this is not something you will be able to fix on your own or I can even nail down to a specific item that is messed up.
P0443 - EVAP control system CANISTER PURGE VALVE CIRCUIT MALFUNCTION - VPWR circuit open - Evap canister purge valve circuit shorted to ground - damaged EVAP canister purge valve - EVAP canister purge valve circuit open - EVAP canister purge valve circuit shorted to VPWR - damaged PCM
The computer on the car purges the evap canister automatically by activating the purge solenoid.The computer on the car purges the evap canister automatically by activating the purge solenoid.
by the tank or evap canister
The Evaporative Emission Control System monitors the fuel vapor flow between the engine intake manifold and the EVAP canister. The system failure occurs when a leak or blockage between the intake manifold, the EVAP canister purge valve and the EVAP canister is detected by the PCM. Code P1443 Possible Causes: - Pinched, blocked or plugged fuel vapor tubes/hoses (except between fuel tank and EVAP canister) - Damaged EVAP canister - Disconnected, cracked or cut fuel vapor tubes/hoses (except between fuel tank and EVAP canister) - Damaged EVAP canister purge valve
Trouble code P0496 means: EVAP Canister Purge System High Purge Flow
The above is copied and pasted from "The Thunderbird And Cougar Owners Club of America" "Straight from the service CD (mostly, I added a descriptor after the code) P1443=A problem with the EVAP purge flow system Continuous Memory Diagnostic Trouble Code (DTC) P1443 indicates an incorrect evaporative system purge control valve flow. Possible causes: -- Obstructed, open or cracked hoses between EVAP canister purge valve and intake manifold. -- Damaged EVAP canister purge valve. -- Damaged PF sensor."
It means you have an Evap purge control leak in the EVAP system. Basically when you have gasoline in a car there are a lot of excess fumes, these fumes are routed through the EVAP system of the car, through a charcoal canister, and returned back to your gas tank as liquid fuel. A leaking charcoal canister, Evap Purge solenoid, PCV lines or PCV elbows can cause this. Also a leaking gas cap can cause this. I would recommend replacing the gas cap first. if that does not do it, check all the connections to the EVAP canister *located in the engine by the firewall*. If there are any leaks, change the elbows or lines. IF the problem still exists you most likely need a new charcoal canister or Canister purge valve solenoid.
The EVAP canister purge solonoid on a 1997 Taurus 3.0L OHV is mounted on the firewall on the passenger side between the strut tower and the engine computer multi-plug. Note: you will see the green EVAP test cap on the plastic line that connects to the canister purge solonoid.
Remove the engine sight shield. Remove the evaporative emission (EVAP) line from the canister purge solenoid, perform the following: * Push the large size white retainer portion in. * Push down, while pulling up slightly in order the disengage the tube. Disconnect the EVAP canister purge solenoid electrical connector Remove the EVAP canister purge solenoid bolt Remove the EVAP canister purge solenoid and insulator Reinstall in reverse order....... toque spec is 91 inch lbs
most likely in the evap canister.
P0455 - EVAP CONTROL SYSTEM LEAK DETECTED ( NO PURGE FLOW OR LARGE LEAK ) possible causes : damaged or missing fuel filler cap / cap not installed correctly after-market EVAP hardware ( such as a fuel filler cap ) not conforming to Ford specs blockages or restrictions in fuel vapor hoses canister vent solenoid stuck open loose fuel vapor hose / tube connections to EVAP system components disconnected or cracked fuel EVAP canister tube , EVAP canister purge outlet tube , or EVAP return tube damaged EVAP canister mechanically inoperative FUEL TANK PRESSURE ( FTP ) SENSOR ( CHECK FOR VACUUM NOISE / FUEL ODOR IN ENGINE COMPARTMENT OR NEAR EVAP CANISTER + FUEL TANK )
fuel system or evap? they are both near the intake, fuel is on the fuel rail going to the injectors and evap is on one of the vacuum lines that travel from the intake to the evap canister, it has a tag on it and a green cap.