Question about 2006 Chrysler Town & Country
Last year I put STP fuel system cleaner in my 2002 nissan sentra gxe with a fuel tank as instructed on the bottle. Later that day my check engine light came on while at school and the code was a gas cap code but that wasn't the cause. I cleaned my evap canister, vaccum cut off valve, checked sensors, the whole nine yards. A different code popped up this time, p1444: purge volume valve flow at wrong time. I followed the diagnostics test to fix the problem but nothing works. I removed my filler neck at school and looked deep inside with a flashlight and I don't see my check valve anymore. What can cause that and what are the solutions to fix it? Thanks
P1444 Purge Flow Sensor Circuit Input Low
The evaporative emission control system checks to make sure there are no leaks in the lines that run from the gas tank to the charcoal canister and up to the engine. It also checks to make sure the gas cap is sealing correctly.
When you fill your car with gas, the vapors in the tank get forced into a canister filled with activated charcoal. Also, on a hot day as the gas heats up and vaporizes, those same vapors push into the canister where they're stored. But the charcoal can only hold so much vapor. At some point it has to be emptied. The emptying process is called "canister purge." Here's how it works.
The computer orders a canister purge by powering open a PURGE solenoid. That opens the vacuum line between the canister and the intake manifold. At the same time, it opens a VENT solenoid. That allows fresh air into the canister. So the engine is literally sucking out the gas vapors and purging the canister with fresh air. The computer has to adapt its fuel strategy to take advantage of all the extra gas vapors coming into the engine.
The computer notices the canister is empty when it detects a leaner condition (all the vapors are used up) and it resumes normal fuel delivery. Some car manufacturers then close the VENT solenoid but leave the PURGE solenoid open. That creates a vacuum throughout the entire fuel storage system. Once the correct vacuum is reached, it closed the PURGE solenoid and waits to see if the vacuum holds. If it doesn, the system passes the test. If it detects a leak, it sets a code.
In this code P1444, the computer sees a lower than expected value on the purge flow sensor. bottom line? replace the purge flow sensor.
Posted on Sep 03, 2009
I have a subaru Forester 99 that works fine.But it burns a lot of gas. My mechanic told me it's my be my filler neck that cause the problem. What do you think?
Your answer is highly appreciated.
Posted on Oct 23, 2009
a 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of.(from cars to computers, handyman, and even drones)
click here to download the app (for users in the US for now) and get all the help you need.
Posted on Jan 02, 2017
Tips for a great answer:
Jan 13, 2016 | 2002 Toyota Highlander
Jan 01, 2016 | 2005 Nissan Sentra 1.8
Mar 01, 2015 | Suzuki XL7 Cars & Trucks
Mar 11, 2014 | Cars & Trucks
May 25, 2010 | 2002 Nissan Sentra
Dec 08, 2009 | 2002 Ford Explorer
Oct 30, 2008 | 2002 Nissan Sentra
Aug 01, 2008 | 1998 Ford Contour
1,524 people viewed this question
Usually answered in minutes!
Step 2: Please assign your manual to a product: