DTC errors,P0731, P0868,P1790 Check Engine light on
Hi guys My CE light has switched on again. Now the jeep is running very slowly, high revs and no real movement ( so said my wife who is currently driving it). Few days ago I had a similar problem, and I was able to extract the DTC errors using my Superchip.
Some Background.
I'm running 35" with 4.88
My jeep stood for more than 10 days without moving, while I was abroad, and when I came back the battery was completely dead. I was able to jumpstart it, and everything seemed ok, except for the low battery I noting when starting it up.
While taking it offroad few days ago it started to express some problems.
I was told it was the low battery that was affecting the computer and I should not be worried, just replace the battery the next morning. So I reset the DTC, and continue to drive, when the battery red indicator came on again.
All went well all the way back home. - I replaced the battery the next morning.
Now the CE light came on again, and the jeep is not really moving.
So I guess it is not the battery fault any more.
Once I changed the battery the overcharge light did not switch on again. I read that sometimes, when you have overcharge, the gear switches to safe mode. Could that be it?
Any ideas what can it be? I found this online.
Beside the gear fluid which seems to be ok, what should I look for?
Could it be that the 4.88 gear ratio changed to default because the battery was dead for so many days?
-N
----- Update ----
Got to the car, and this is what came on the DTC monitor.... :-(


I've checked the programed settings of the gear ratio, and it was fine.
So i've decided to tow it to the dealer....
What do you guys say... should I go and try to sell a kidney?
-N
Some Background.
I'm running 35" with 4.88
My jeep stood for more than 10 days without moving, while I was abroad, and when I came back the battery was completely dead. I was able to jumpstart it, and everything seemed ok, except for the low battery I noting when starting it up.
While taking it offroad few days ago it started to express some problems.
I was told it was the low battery that was affecting the computer and I should not be worried, just replace the battery the next morning. So I reset the DTC, and continue to drive, when the battery red indicator came on again.
All went well all the way back home. - I replaced the battery the next morning.
Now the CE light came on again, and the jeep is not really moving.
So I guess it is not the battery fault any more.
Once I changed the battery the overcharge light did not switch on again. I read that sometimes, when you have overcharge, the gear switches to safe mode. Could that be it?
Any ideas what can it be? I found this online.
Beside the gear fluid which seems to be ok, what should I look for?
Could it be that the 4.88 gear ratio changed to default because the battery was dead for so many days?
-N
----- Update ----
Got to the car, and this is what came on the DTC monitor.... :-(
I've checked the programed settings of the gear ratio, and it was fine.
So i've decided to tow it to the dealer....
What do you guys say... should I go and try to sell a kidney?
-N
Last edited by StormJKU; May 19, 2014 at 08:44 AM.



