All I am new to this forum and signed up because I assumed you all could provide some guidance on how I should proceed...

I just purchased last December a 2006 Jeep Grand Cherokee Limited 5.7L Hemi with 72K... Great looking Jeep! :-)

I have put about 6K miles on it since I got it and have made the following modifications:

a. OME 2" Lift Kit
b. New Tires and Rims 275 60R17 (Mickey Thompson - Baja)
c. K&M Cold Air Intake system
d. Flowmaster exaust
e. SuperChips 3875 Flashpaq Tuner
f. Had Firestone change the transmission fluid and filter
g. Changed the oil to Mobil 1 full synthetic
h. Changed the front and rear axle fluid (Royal Purple) cheated didn't pull the covers off just pulled the fuid out with a pump and filled it with a pump...

Today on the way into work I got the Check Engine Light... :-(

read the codes with the Superchips Flashpaq Tuner and got seven codes out:

1. PO128 - thermostat rationality

2. PO700 - transmission control system (mil request)

3. PO731 - gear ratio error in 1st gear

4. P1790 - fault immediately after shift

5. P2701 - inadequate element volume 2c

6. C1405 - transmission case range position sensor circuithigh

7. C140f - transfer case range position sensor erratic performance

Cleared the codes using the scan tool, but didn't fix anything... What do I need to do?

Thanks,

Roger

 

Sta by having the battery and charging system checked. Low voltage, or extremely high voltage can cause some strange things to happen. Rule out the basic stuff first.

 

Thanks! After I cleared the codes they didn't come back nor has the ride changed... I believe you were correct reference the battery charging system... Still have not been able to go get it checked... Plan on doing it on Wednesday ... More to follow.

Roger