Question about 2004 Chrysler Pacifica

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The fuel guage on my 2004 Chrysler Pacifica jumps around

The fuel guage on my 2004 Chrysler Pacifica goes from the actual fuel level to empty repeatedly and the low fuel chime goes off. How do I fix this or how do I turn off the chime?

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The problem will get worse, to the point that it will leave you stranded, out of gas. The solution is simple but most dealers don't catch it. They try fuel pumps, computer updates, sensors and the problem persists. You can fix this problem yourself and without spending a nickel. Want to know how I know? I've owned two Pacifica's and both have done this. Here's why: The Pacifica has a very unique and poorly designed fuel storage system. It uses what is refered to as a saddle tank. This is so they can use the same tank in both the all wheel drive and the front wheel drive versions. If you look underneath you will see it actually looks like two tanks. The driver side is the fill side and the passenger side is the delivery side. There are actually two fuel pumps, a main pump (pumps gas to the engine) and a equalization pump (pumps fuel from the the fill side to the delivery side of the saddle tank. The problem that you are experiencing carries with it several symptoms; running out of gas when the tank is half full, the gas gauge dropping suddenly at half full, and the inability to pump more gas into the tank without shaking the car back and forth and/or pumping very slowly. This is because of the way the two sending units inside the tank send their signals to the gas gauge and the fact that only when the fill side of the tank is 100% full, can some of the gas flow over the top of the hump to the delivery side tank. You can replace pumps all day long and most likely still have the problem. So what's the fix? It's simple. Underneath the vehicle, inline with the emissions lines going to the gas tank, about middle of the vehicle, there is a small plastic air inlet filter about the size of 50 cent piece mounted to the floor of the vehicle. It is responsible for venting the tanks pressure, allowing fuel to flow into the delivery side tank. It get's full of dirt and debris. Replace it a cost of about $3.50 or just blow it out with compressed air. If you don't want to do it yourself, help those dealers out - point them in the right direction, or else they will be running in circles trying to fix the problem. NOTE: this is only a problem on Pacifica's, not other vehicles. More info on this issue here; http://www.dodgeboard.com/forums/index.php?threads/my-crazy-gas-gauge.6381/

Posted on Jul 11, 2012

  • 1 more comment 
  • ray johnson May 22, 2013

    i have a 2004 pacifica touring my gas gauge will be just under a half of tank before it drops to empty or almost empty i really dont have the funds to change pumps but the vehicle runs so im thinking thts not the problem i will try your solution and see what it does will post back soon thanks for the advise

  • Tim Trent
    Tim Trent May 22, 2013

    http://www.dodgeboard.com/forums/index.p...

  • Robert Frost Aug 16, 2014

    .I had the same problem with my wifes seabring yesterday and found that this easy built in test fixed it. I found it looking for Odometer prob. (needle stuck under the resting peg) this fixed both. It's an amzing and easy test/fix. Her we go.....1. Press and hold the odometer reset button (post) 2. Put key in ignition and turn to run (NOT START). 3. When needles begin to move, release the odomoter reset button (post). Voila - speed and tach are reset to 0 on the correct side of pin.This is often caused by a voltage surge. If this has happened at the same time as a bad start or other eletrical problems, I would suggest a AVR test to check the batter/ alternator/ starter.Cheers,RobA variation on this worked on my 2004 Dodge Caravan. I held in the trip reset button and turned on the key, then released the button, but the gauges didn't reset. I then held the reset button and turned the key off. The trip display turned to a text field which said "5of5" I released and then pressed the reset again and the trip display changed to an error code. One more release and press resulted in all the gauge area text displays lighting up in a self test, then the gauges deflected to full deflection then reset to their home position, fixing my speedometer needle problem and fuel gauge (down (ding) back to normal... Good luck

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This is a simple service fix. It's a glitch in the computer system. Take it to the dealer and there is some sort of code they can enter to "update" the car's computer.
Mine does it occasionaly, it annoying, but not harmful.
I've heard of some that will act up for a while, then stop, while others, have acted up and them the fuel gauge stays on empty.
Talk to the dealer.

Posted on May 25, 2010

  • 1 more comment 
  • Tim Trent
    Tim Trent Jul 11, 2012

    The problem will get worse, to the point that it will leave you stranded, out of gas. The solution is simple but most dealers don't catch it. They try fuel pumps, computer updates, sensors and the problem persists. You can fix this problem yourself and without spending a nickel. Want to know how I know? I've owned two Pacifica's and both have done this. Here's why: The Pacifica has a very unique and poorly designed fuel storage system. It uses what is refered to as a saddle tank. This is so they can use the same tank in both the all wheel drive and the front wheel drive versions. If you look underneath you will see it actually looks like two tanks. The driver side is the fill side and the passenger side is the delivery side. There are actually two fuel pumps, a main pump (pumps gas to the engine) and a equalization pump (pumps fuel from the the fill side to the delivery side of the saddle tank. The problem that you are experiencing carries with it several symptoms; running out of gas when the tank is half full, the gas gauge dropping suddenly at half full, and the inability to pump more gas into the tank without shaking the car back and forth and/or pumping very slowly. This is because of the way the two sending units inside the tank send their signals to the gas gauge and the fact that only when the fill side of the tank is 100% full, can some of the gas flow over the top of the hump to the delivery side tank. You can replace pumps all day long and most likely still have the problem. So what's the fix? It's simple. Underneath the vehicle, inline with the emissions lines going to the gas tank, about middle of the vehicle, there is a small plastic air inlet filter about the size of 50 cent piece mounted to the floor of the vehicle. It is responsible for venting the tanks pressure, allowing fuel to flow into the delivery side tank. It get's full of dirt and debris. Replace it a cost of about $3.50 or just blow it out with compressed air. If you don't want to do it yourself, help those dealers out - point them in the right direction, or else they will be running in circles trying to fix the problem. NOTE: this is only a problem on Pacifica's, not other vehicles.

  • Tim Trent
    Tim Trent May 22, 2013

    http://www.dodgeboard.com/forums/index.p...

  • wesley smith
    wesley smith Jan 11, 2014

    this did not work for me i replaced the filter with a new one and am still having all the problems you mentioned. the gauge dropping to empty at half tank, and only being able to put about 5 bucks or gas in. please help

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I own a 2005 Pacifica and the fuel gauge suddenly jumped from half full to empty. Brought it to the dealer- they replaced a sensor(it also would not allow the gas to be pumped in without holding down the lever on the gas pump-kept shutting off). This did not work. Brought it back- dealer fixed another sensor. Works better now but still not fixed (easier to pump gas into tank & gauge holds to just below half full). Have to keep track of mileage.

Posted on Jun 27, 2010

  • amyjahn28 Aug 20, 2010

    Our 2005 Pacifica started this on our vacation. Have you contacted Chrysler about the defect? We're trying to figure out what others have done in this situation to get it fixed. Thank you.

  • Tim Trent
    Tim Trent May 22, 2013

    http://www.dodgeboard.com/forums/index.p...

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The fuel sending unit in the gas tank is bad you must drop the gas tank to fix also make sure to clean the ground wire and reinstall it on a clean surface

Posted on May 05, 2010

  • 1 more comment 
  • Tim Trent
    Tim Trent Jul 11, 2012

    The problem will get worse, to the point that it will leave you stranded, out of gas. The solution is simple but most dealers don't catch it. They try fuel pumps, computer updates, sensors and the problem persists. You can fix this problem yourself and without spending a nickel. Want to know how I know? I've owned two Pacifica's and both have done this. Here's why: The Pacifica has a very unique and poorly designed fuel storage system. It uses what is refered to as a saddle tank. This is so they can use the same tank in both the all wheel drive and the front wheel drive versions. If you look underneath you will see it actually looks like two tanks. The driver side is the fill side and the passenger side is the delivery side. There are actually two fuel pumps, a main pump (pumps gas to the engine) and a equalization pump (pumps fuel from the the fill side to the delivery side of the saddle tank. The problem that you are experiencing carries with it several symptoms; running out of gas when the tank is half full, the gas gauge dropping suddenly at half full, and the inability to pump more gas into the tank without shaking the car back and forth and/or pumping very slowly. This is because of the way the two sending units inside the tank send their signals to the gas gauge and the fact that only when the fill side of the tank is 100% full, can some of the gas flow over the top of the hump to the delivery side tank. You can replace pumps all day long and most likely still have the problem. So what's the fix? It's simple. Underneath the vehicle, inline with the emissions lines going to the gas tank, about middle of the vehicle, there is a small plastic air inlet filter about the size of 50 cent piece mounted to the floor of the vehicle. It is responsible for venting the tanks pressure, allowing fuel to flow into the delivery side tank. It get's full of dirt and debris. Replace it a cost of about $3.50 or just blow it out with compressed air. If you don't want to do it yourself, help those dealers out - point them in the right direction, or else they will be running in circles trying to fix the problem. NOTE: this is only a problem on Pacifica's, not other vehicles.

  • Billy Doles
    Billy Doles Sep 12, 2012

    hi my 2004 pacifica awd is having the same problem but i cant seam to find this air inlet filter ive found the charcole filter but its not the size of a 1/2 dollar.what else would u know...there in a vent tube running up to the inlet where u put fuel in but that seams to be working,i really need to figure out this problem every one keeps talking about an air inlet filter but my car seams to not have one. thanks

  • Tim Trent
    Tim Trent May 22, 2013

    http://www.dodgeboard.com/forums/index.p...

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I had the same issue, I just went to the car salvage yard and picked up both pumps and it fixed the problem for me. It seems that the floater in the pumps were faulty or either the pumps themselves were bad. I could say that it worked for me by just replacing both pumps to fix the gauge issue... It seems like a pretty common issue with the pacificas. I hope that this will help anyone that has the same problem..

Posted on Jul 31, 2016

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