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2002 Jeep Liberty DTC P0352

Feb 27, 2008 1:25AM PST

While driving home from Salt Lake City, UT to Boise, ID, I experienced a loss of power approx. 150 miles into my 320-ish mile trip. The Malfunction Indicator Light (light with engine symbol) was flashing as I continued to try and drive to the closest town. I was able to continue driving at speeds between 70 and 80 mph with the acceleration pedal to the floor and several decreases in power for approx. 30 miles. I finally pulled over when I was unable to maintain a decent speed after down shifting to get up a small hill.
The Jeep has less than 40,000 miles and my husband filled the nearly empty gas tank in Salt Lake with 85 Octane gas. He mentioned that the gas cap did not seem to go on right and that he did not bother to reseat it. While waiting for a tow truck, I did uncap the gas cap, which may have felt a little loose and recap it tightly. The tow truck got me to town, however it being a Sunday afternoon in rural Idaho, nothing was open. When I started the car, the MIL was on (no longer flashing) and drove the car to a gas station. This time there was no hestitation (loss of power) while driving. I filled up my 1/2 full tank with 91 octane gas and added a fuel additive hoping my problem was bad gas or something. I managed to drive home to Boise with no problems except that the MIL stayed on. (I drove at speeds of 85mph up and over several different grades and the car did not emit any strange or loud noises.)
Since the MIL light was still on, I took the car to a local garage. They tapped into the computer and got the following code: P0352 Ignition Coil B Primary/Secondary Circuit Malfunction. The car's computer has been reset and the light is now off. The car starts and drives fine. Should I be concerned and take the car to a dealer to see if there is something wrong with the ignition coil or wait and see if the problem reoccurs and hope it doesn't leave me stranded somewhere?
Thank you for any and all help.

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