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Read my earlier posts
Sorry for bluntness. On quick break on mobile platform
Architect
Issue:
Like mech3, the car would randomly feel like it was stalling out when I would step on the gas pedal. This wouldn't happen frequently, but definitely at very inopportune times. The check engine light would come on and if I wasn't stopped, the car would feel like it was starting to shut down.
I have taken it to the shop now three times, and this is the first time they were able to get an error code generated. Note, this is also the first time that the check engine light actually stayed on by the time I arrived at the shop.
Potential Resolution:
Like bhunley, I am having the crank shaft sensor replaced ($420) as well as a couple other sensors ($140). The mechanic said that when the crank shaft sensor isn't receiving the signals correctly, it essentially starts shutting down the car (or something along those lines). He did say that the error needed to happen a few times before the code would get registered by the computer, which is why they couldn't target the problem the first two times I brought the car in. Thankfully, they never charged me for those trips!
Anyway, I'll post back in a few days to let you all know if that fixed my problem. Best of luck to you all...
A technician told me that some of the circuits "fail safe" meaning that when they malfunction, headlights may go on or wipers may runs etc.
My particular problem with my harness was for many times (5) diagnosed as a bad module here or there (refer to my earliest posts in these threads). Some modules were replaced more than once or twice. In my experience, some of the modules were actually OK, but the harness was shorting out modules and ignition switch, etc. I would not be two miles down the road from what was supposed to be a successful repair only to see same "crazy dashboard light show" happen again and again. They did not believe me until i filmed it on my phone's video capability.
Quite frankly, with the new harness my Jeep is running so smooth and true and is like it was always meant to be. It idles smoother than when I bought it, as well as consistently performing well in all kinds of Wx.
The repairs for all the modules replaced totaled $2100 for mine, which I paid over a series of repairs. (Oouch !!!) Then I got in touch with Jeep Customer Support and they were, IMHO, great about dealing with my issue. I was totally documented with dates, times , receipts, etc. I even had them speak directly with Jeep Service Manager as well. In the end they covered to cost of the harness so... I don't know what the actual expense was but BOTTOM LINE.. it was worth all the agro that i went through.
Years ago I personally installed a new wiring harness on my '72 Honda 350CL motorcycle and it to never ran better.
So, as one can see, I am "all about the harness" as being a prime source of many of the symptoms I read in this forum. Sadly, only one way for you to find out...
Best o' Luck
Architect
06 Laredo
103,000 and running smooth
If it's not that, a friend of mine had the same issue (start for 3-5 seconds then stall out) and it was just his key, which he had to get replaced.
Hope that helps!
The part is about $170 and most of the time the dealer has to reprogram the key if it has a build in chip. Good luck, Joe D
if you have battery going bad will change you voltage enough to seam as the computer has to re set cheaper than chasing other things
i hav had to change batteries bout every two years or so here in az now have 237000 miles on it
as you have to have it jumped wood start with battery as could be something loose inside bouncing a round
I did see a supplier list a bolt on fan blade for 4.0 engine. It may use a little more fuel, but you no longer have to worry about unreliable electric fan and solid state relay failure. P.S. i worked in test and evaluation of high power computer power supplies for 20 years. This application is not a dependable design for a product used in a harsh environment.
:mad: Yesterday, I walked out to run an errand and the remote wouldn't unlock the doors. Tried the spare remote and it didn't work either, eliminating the key/fob as having a dead battery. Got in, turned the key, it started up as always, ran about three seconds and died. Tried again and the normal indicators were lit but there was no reaction to turning the key; nothing. Called my mechanic who mused that it was probably the fuel pump. Didn't strike me as a fuel problem; too abrupt, felt more electrical. Grabbed my laptop, "Googled" starting problems and found one posting from what sounded like a mechanic. He made the following suggestion and it worked first try. Hoping it helps someone else here.
:surprise: Open the hood and remove the positive battery lead. Leave it unconnected for five minutes and do nothing else. Re-install and tighten the lead. With the remote, alternately press the door lock and unlock buttons three times each. Insert key into ignition and start it up. Apparently, the anti-theft system can interpret several different events as being an attempt to steal the car and so it shuts off the fuel supply to prevent theft. Removing the battery lead causes the computer - and the anti-theft system - to re-boot and clear all faults.
You can't imagine the relief I felt and how much I appreciate someone making that solution available. Hope whatever problem you're having is so easily, quickly and inexpensively resolved by someone's help.
It has happened to me several times.
My friendly Advance Auto Guys helped me out.
We were also having the transmission problems of it slipping in and out of gear. We had the transmission check by a transmission specialist and physically it was fine and they said it's probably something electrical causing it like the transmission control module. We just took it to our Jeep Dealership finally to have a diagnostic run and they said it was giving them error codes that the Transmission Control Module was bad. They replaced it a few days ago (almost $900 for parts + labor) and hasn't slipped since, but we'll see with time.
Meanwhile, the same funky electrical issues continue (lights flickering, fan/ac/heat only works on high, etc.)
After much, much research online trying to diagnose and fix these problems it's amazing that there is nothing anywhere from an actual Jeep tech or mechanic about this issue and how to fix it.
Please post if you find a solution and will do the same.
Thanks!
it is the main wiring harness for the "bus circuit" for which your electrical system is indicating a problem. I believe there are three bus circuits.
A qualified Jeep technician can talk to you about this and how they indicate failure of components. Jeep dealers have a sophisticated computer diagnostic that is far superior to what the small mechanics typically use. It will point to modules more often than to the actual wiring harness. In fact I am not sure if their (or any) diagnostic is designed to and can detect a faulty harness. (?)
I replaced many modules and some twice to almost $2100. After all that I replaced two harnesses and my Jeep 06 GCL has been running as smooth as can be ever since.
See my earlier posts for more info re wiring harness :shades:
Recently I did replace the right rear wheel speed sensor which failed and, while I was at it, replaced the spark plugs. Typical recommended mileage for spark plugs is 40k... and mine went 105k.. wow !!!
The gap was at least twice normal but now with new plugs with perfect gap I am still not getting any difference in MPG. go figure.
QUESTION: has anyone noticed that after turning a corner the Jeep loses acceleration power curve until on straight path. almost like to old carbs with a float valve?
This is how far I went. After expieriencing the same electrical issues, my crank position sensor went bad all of the sudden. Then the interior lights wouldn't go off. Eventually the car backfired blew my muffler round as a balloon. I was replacing everything including the ignition switch that locked up. Distributer, roter, basically bandages, then being the computer geeket that I am figured that the PCM is sending the wrong signals. I checked the PCM and noticed that the front cover is actually the MOTHERBOARD!!! Wow even I know this should be protected by a copper box or something. Well after removing the two torque screws I turned the PCM upside down and my car started stronger and I noticed that I actually get better gas milage. Does any of this make sence? I'm kinda replying fast so I don't have time to proofread my reply.... If you need a pic let me know.
I had the Transmission Control Module replaced at a Jeep Dealership to correct the slipping issue.
As for the lights flickering issue, I had the Jeep Dealer also replace the multi switch (the turn signal/lights control) and that did the trick...you can tell the difference in how firm the new switch is compared to how loose the old one felt.
One last note to anyone trying to fix anything on their own...make sure you buy original Chrysler/Jeep parts versus anything from AutoZone or a place like that. According to my mechanic, Jeep products don't do well with any parts that are not original Jeep.
Good luck!
Now all that's left to do is change the heater core, Blend doors and Hydraulic radiator fans' solenoid and my 2002 G.C. will be like new :~1 Guess that's why Jeeps acronym is Just Empty Every Pocket.
Thanks again!
Rob
On May 9, 2011 there was a problem with the dashboard and tail lights going out. You would be driving and all of a sudden everything on the dashboard would go dead, rear tail lights would go out, but the vehicle would still run fine. She shut the vehicle off, went to restart it and everything would come back on as if nothing happened. It was brought up to the dealership and had to be left there for two weeks.
No error codes were found on the computer, and the instrument cluster was replaced which seemed to fix the problem. The Jeep had two incidents where the dash went out again and it was brought back up and checked. There was a loose connection in the wiring which was fixed and the vehicle was fine. The total cost for the repair was $943.22. I could not believe the cost and this is why I hate new cars with extra electronic devices that I feel are not needed. It is so much cheaper to fix my 1975 CJ5 which runs great, lol.
Back to the 2005 Jeep Grand Cherokee, in the month of Aug the check engine light would come on and off. Which happened a few random times but the vehicle ran fine and everything worked or so we thought.
The last week of Oct my family member went out to do some shopping and all of a sudden on the dashboard all the brackets on the gears were on as if the vehicle had all gears engaged but the vehicle was in drive. Also the check engine light was on too. When it happened the vehicle went into a low gear and was dragging. She pulled over shut the Jeep off and turned it back on. Everything came back on and seemed to be okay and she made it home. We turned the Jeep back on once again all the brackets on the dashboard were on the gears even though the vehicle was in park and the check engine light was also on. I noticed the brackets were flashing on and off. So we called a friend who repairs older Jeeps and asked if we could bring it up. I drove the Jeep everything was fine. I stopped at a red light when the brackets came on and the vehicle went into a low gear. I pulled over and tried to restart it until it would go off. I got lucky and made it up to his private shop. These are the codes that came up on his computer.
#1 P0700 Trans Control Sys Malfunction
#2 0404 Invalid Data Recovered From Control Module Gear Shift
Note: P0700 Came up twice
He said you have to take it up where they have the computer to put it on. Also sometimes the codes are not saved on the system in your vehicle or it might take several times for the computer to save it. So I made my way home and we had the vehicled towed to the dealership. I t was unsafe to drive and we did not want to ruin the 4x4 or transmission.
On Nov 2, 2011 the vichle went up for repair and on Nov 4, 2011 it was fixed. They replaced the PRNDL/ESM Module and so far today the vehicle has been okay. The repair cost $1,199.66. I really hope that the Jeep is fixed and we do not have any more issues. The computers and repairs are so expensive and can be a nightmare. I dislike having a computer decide if my 4x4 should be on or not. That should be up to the driver to engage because what do you do if the computer malfunctions and you can't shut it off? I hope this helps and if anyone has had the same problem please let me know.
Jeep acted strange this week. Alarm went on three times this week without any reason.I got message on dash board that tailgate are open but they not.
And finally before I turn key my wipers went on on perfect weather.
Now when I turn the key I got all light on the dashboard and after 5-7 second everything disappear and looks like there is now power. Of coarse engine not starting. I can only hear some noises going i think from transmission.
Anybody have any idea. please help