2006 Jeep Liberty help

[bowNarrow]

i know there's a few mechanics on here so my wife's jeep has a issue. the has  gas gauge sometimes goes to empty and the check engine light comes on. ive read the code and its U1411. which from what ive read could me numerous amount of things. Anyone else had this issue before. there's no warranty and i trying to stay away from the dealership. but its a last ditch effort before i have to

[bowNarrow]

also its doesn't do it all the time. sometimes the light turns off by itself. really pissing me off trying to do emissions with a light on

[Heredoggydoggy]

Make sure the gas cap is tight.  Lots of error code problems are just a loose gas cap.  (I'm not a mechanic--I just play one on TV) 

[jackelope]

Loose gas cap won't make the fuel gauge drop. U codes are communication codes. Loose gas cap will set P codes. P0456 etc.

[bowNarrow]

i figured it wasnt the cap.  the code is   U1411 implausable fuel volume.  which im hoping its not the pcm

[jackelope]

You've got a couple options. You can throw some parts at it. If you want to do that, I'd go to google, type that fault code in followed by 2006 jeep liberty and see what comes up. My unofficial no guarantees Internet guess would be the fuel level sending unit in the tank but to be sure you'd need to have test equipment on it when it is failing. Could be a PCM, cluster, wiring...etc.  You could take it to an aftermarket shop and take your chances on whether or not they can properly diagnose communication fault codes. You can take it to a dealership service dept and have it diagnosed.

[Bob Williams1]

You've got a couple options. You can throw some parts at it. If you want to do that, I'd go to google, type that fault code in followed by 2006 jeep liberty and see what comes up. My unofficial no guarantees Internet guess would be the fuel level sending unit in the tank but to be sure you'd need to have test equipment on it when it is failing. Could be a PCM, cluster, wiring...etc.  You could take it to an aftermarket shop and take your chances on whether or not they can properly diagnose communication fault codes. You can take it to a dealership service dept and have it diagnosed.

But also get on some of the Chrysler Jeep forums- Unfortunately i am almost certain your issue is probably not unique. I discovered that the hard way after buying a grand cherokee for my son and then looking on the forums..Shoulda looked on the forum first and i probably would have gone another way.  Lesson learned.

Point being lots of same type issues happening to other customers with the same product.. Not necessarily workmanship just cheap components to save a buck.

Good luck- There's never a good time for car troubles

[jackelope]

Implausible Fuel Volume Signal Received


Possible Causes

CAN B OPEN OR SHORTED

CLUSTER MODULE

FRONT CONTROL MODULE

PCM

Theory of Operation


The Front Control Module isn't receiving a fuel volume signal over CAN B from the Cluster Module. The FCM has to send the PCM a fuel volume signal over CAN C. The signal the FCM sends over CAN C is implausible.

[jackelope]

That should clear things up.

[bowNarrow]

I've been on just about all the sites I can find and there's no real definitive answer. Mostly likely ill have to get it diagnosed  at the dealership then go from there

[Heredoggydoggy]

This may be Old School thinking, but most automotive electrical problems are simply a bad ground.  Long shot, but it's a cheap place to start.  I hate the new computerized stuff.  So bad that I'm selling my 2007 GMC Canyon truck because it's such a computerized piece of junk...

[jackelope]

This may be Old School thinking, but most automotive electrical problems are simply a bad ground.  Long shot, but it's a cheap place to start.  I hate the new computerized stuff.  So bad that I'm selling my 2007 GMC Canyon truck because it's such a computerized piece of junk...

What are you going to replace it with? You've got to go back to around 1986 to get away from a computerized system in a GM truck.

[Heredoggydoggy]

This may be Old School thinking, but most automotive electrical problems are simply a bad ground.  Long shot, but it's a cheap place to start.  I hate the new computerized stuff.  So bad that I'm selling my 2007 GMC Canyon truck because it's such a computerized piece of junk...

What are you going to replace it with? You've got to go back to around 1986 to get away from a computerized system in a GM truck.

Already replaced it--with a 1986 Ford Ranger Pickup.  I realize the fuel injected engine it has is controlled by a computer, but the whole truck is a basic vehicle.  The GMC was OK when it was my only vehicle, but it isn't now, and I don't need a fancy truck just to go to Lowes for a couple of bags of cement and a 2x4.  I bought the GMC to replace the '91 Ranger that got totalled in an accident, and I missed the Ranger terribly.  When the '86 Ranger with 79,000 original miles came up, I snapped it up.

[bowNarrow]

turns out the problem is the fuel sending unit inside the gas tank.  dealer wanted 970.00 bucks to fix it  , i found the part online for 70 just gotta drop the tank and swap it out.

[BOWHUNTER45]

We have a 2004 and it does the same thing ....There is a sensor that goes bad in them ...but even after we had it fixed it lasted for awhile before it came on again and it still does it once in awhile as of today ... I gave up on it  it runs fine other than the light coming on 

[jackelope]

turns out the problem is the fuel sending unit inside the gas tank.  dealer wanted 970.00 bucks to fix it  , i found the part online for 70 just gotta drop the tank and swap it out.

Dealer will only offer you a complete fuel pump module. What you got for $70 is probably a level sender. You'll have to take the pump module apart and replace  the sender. Do yourself a favor and keep driving it till its almost out of gas. Let us know how it goes.

[Heredoggydoggy]

Ditto on the driving 'til it's almost empty.  I had to drop the fuel tank out of my '90 Bronco II about 4 times, and draining the gas out of a tank is a PITA!
You get good at it after a while... 

[philepe]

Never hurts to try Techron additive.  Ford had a TSB a few years ago about inaccurate and erratic fuel readings, their first recommendation was to add Techron and run a tank through it.