P0441 I checked the purge valve?

Tiny
YAZIDAN
  • MEMBER
  • 2016 JEEP CHEROKEE
  • 2.4L
  • 4 CYL
  • 4WD
  • AUTOMATIC
  • 129,000 MILES
P0441 purge incorrect flow. I checked the purge valve it seems to open and closes. When the purge valve is purging the fuel tank pressure sensor did not go down to vacuum it stayed at 3.46 KPA but ESIM switch went to closed. After I open the gas cap, fuel tank pressure sensor stayed the same at 3.46 KPA. ( The scan tool I have does not use InH2O or Hg ). It that seems like a bad fuel tank pressure sensor or could be something else? Also what the gas tank fuel pressure should be in KPA when the gas cap is open?
Wednesday, December 10th, 2025 AT 3:49 PM

13 Replies

Tiny
KEN L
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Yep, this sounds like the pressure sensor is bad, here is the location so you can swap it out to help fix the problem, be sure to clear the codes once the repairs are completed.

Normal FTPS values (key on, engine off): Typically around 0 kPa (atmospheric pressure) It will drift slightly ±0.3 kPa depending on altitude and temperature.

When you open the gas cap: FTPS should immediately drop to approx 0.0 kPa. If it stays unchanged - sensor is stuck or the reference hose/port is blocked.

The sensor is on the fuel tank with the fuel pump. Check out the images (below). Please let us know what happens.
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Thursday, December 11th, 2025 AT 10:23 AM
Tiny
YAZIDAN
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Do you know if there is an access hole underneath the back seat to get to it. Also, what you mean by reference hose/port is blocked. Also can I get the wiring diagram of the connector like that I can check 5v ref ground and signal for circuit integrity
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Thursday, December 11th, 2025 AT 10:51 AM
Tiny
KEN L
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If the hose from the purge valve might be pinched shut so the vacuum never makes it to the tank so please check that, there is no access port to the tank so it will need to be removed and the gas drained first, this video can help with that.

https://www.youtube.com/watch?v=Q5MH2gnyFH0

Here is the wiring diagrams so you can see what is going on and how the sensor works. Check out the images (below).
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Friday, December 12th, 2025 AT 8:12 AM
Tiny
YAZIDAN
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AllData gave you the wrong information. the sensor is located on a hose underneath the rear right liner fender. I checked by unplugging the connector. the pressure went down to minus 820 Pa. I am glad the sensor is NOT on the gas tank. this is a short video where is located .
https://youtube.com/shorts/2CR0k_HLvb8?si=8his6WISyZ0-WIoy
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Friday, December 12th, 2025 AT 9:54 AM
Tiny
KEN L
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Perfect nice work! This will help others.
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Saturday, December 13th, 2025 AT 8:46 AM
Tiny
YAZIDAN
  • MEMBER
  • 154 POSTS
The FTPS was replaced. Check engine light is off but p0441 is a permanent code. How many drive cycle I need to drive to clear the code by the PCM. Is there a fast way to be done?
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Monday, December 22nd, 2025 AT 3:36 PM
Tiny
KEN L
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Yes, I would use a scanner to clear the codes, this video should help.

https://www.youtube.com/watch?v=ahK_eucFi-k&pp=0gcJCU0KAYcqIYzv

Please let us know what happens. Ken
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Tuesday, December 23rd, 2025 AT 10:09 AM
Tiny
YAZIDAN
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Yes, I did use scan tool to try erase the code. But because it's a permanent code. The scanner cannot erase the code. The computer will erase it when it sees that the fault is gone. But I want to know how long will take the PCM to erase the code?
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Tuesday, December 23rd, 2025 AT 6:01 PM
Tiny
KEN L
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If the code comes back even though you have not started the engine or run it for any length of time I would say the PCM is bad. You can remove it and send it in for testing these guys do a good job:

https://www.flashmastersecm.com

No code is permanent they all should be able to be cleared and then the code will come back if there is a problem. Let me know what happens.
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Wednesday, December 24th, 2025 AT 10:04 AM
Tiny
YAZIDAN
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I checked the PCM today the code is gone by itself without erasing it, two monitor still not ready the Evap and o2 sensor.
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Wednesday, December 24th, 2025 AT 2:53 PM
Tiny
KEN L
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Yep, you will need to drive the car through serval how and cold cycles for the monitors to reset. Please go over this guide to help

https://www.2carpros.com/articles/how-to-reset-an-engine-computer-monitor-program

Please go over this guide and get back to us.
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Thursday, December 25th, 2025 AT 10:39 AM
Tiny
YAZIDAN
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Hi
passed emission thanks.
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Monday, December 29th, 2025 AT 8:22 PM
Tiny
KEN L
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NICE! Use 2CarPros anytime, we are here to help. Please tell a friend.
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Tuesday, December 30th, 2025 AT 9:46 AM

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