The Check Engine light comes on. Ran a check. Small Emissions leak. Charging system light keeps coming on. Took it to an Auto Parts place they did a battery/alternator test on it. Said it was the battery. Replaced the battery. This didn't fix the problem. Yesterday was driving to pick my brother up and the lights starting dimming now I need a new alternator, which I heard is a common thing with the jeep liberty. The wonderful thing is the alternator costs 189.00 every time and the battery 140.00. Great!!!