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How do you fix a p0441 code?

Alton Alexander
By Alton AlexanderUpdated on June 4th, 2022

P0441 is an error code that indicates a problem with the evaporative emission control system. This system is responsible for controlling the release of evaporated fuel vapors from the fuel system. If there is a problem with this system, it can cause the engine to run improperly or even stall.

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1. Check the gas cap for proper seal and engagement

  1. Locate the gas cap on the engine. On some vehicles, the gas cap is located on the front of the engine. On other vehicles, the gas cap is located on the rear of the engine.
  2. Check to see if the gas cap is properly installed. If the gas cap is not properly installed, it may not be sealing properly against the gas tank. In this case, the engine may not be able to properly use the fuel in the gas tank.
  3. Check the gas cap for proper engagement. On some vehicles, the gas cap is held in place by a spring. On other vehicles, the gas cap may be held in place by a metal clip. In either case, the gas cap should be properly engaged with the gas tank. If the gas cap is not properly engaged, the engine may not be able to properly use the fuel in the gas tank.

2. Check for leaks in the EVAP system

  1. Check for leaks by spraying a vacuum pump cleaner into the EVAP system from the charcoal canister vent and then checking for any drops on the gauge.
  2. If leaks are found, replace the EVAP system.

3. Check the EVAP canister for proper function

  1. Turn the car off and then on again.
  2. If the car starts and runs fine, the likely problem is with the battery. If the car does not start, the problem is most likely with the evap canister.
  3. To check the evap canister, first remove the air bag.
  4. Next, use a vacuum cleaner to vacuum the canister. Be sure to use the hose attachment.
  5. Next, use a can of compressed air to spray into the canister. Be sure to use the needle valve to control the pressure.
  6. If the car starts, the problem is most likely with the canister. If the car does not start, the problem is most likely with the battery.

4. Check the EVAP purge solenoid for proper function

  1. With the engine off, use a flashlight to inspect the EVAP purge solenoid for proper function.
  2. If the EVAP purge solenoid is not functioning properly, replace the solenoid.

Still not working? maybe try:

  1. Check the EVAP vent solenoid for proper function.
  2. Check for blockages in the EVAP system.
  3. Check the EVAP pressure sensor for proper function.
  4. Check the EVAP canister vent valve for proper function.
  5. Check the fuel tank pressure sensor for proper function.