An engine misfire at idle (rough idle), accompanied by illumination or flashing of the Check Engine Light, could indicate a problem with one or more of the intake valves. Revised intake valves & valve locks are available to address this concern.
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Newest reported 2003 Jeep Liberty problems
If the power door locks are buzzing or are intermittently noisy, a new door latch assembly may solve this. The door lock actuators are integrated into the latch assemblies.
Leaks at the front and/or rear differential pinion seal and from the transfer case are common. Low fluid level in the differential or transfer case can result in bearing failure. Damaged bearings commonly cause a whine or growl type noise.
If previous drive belt replacements have not fixed a problem with a chirping belt, there is a service bulletin that outlines a revised drive belt routing.
P01776 and P0740 faults stored in Trans. Intermittently the transmission will not go into overdrive. After restarting the vehicle it will drive fine for 1 to 3 days. just replaced solenoid pack, oil and filter. keeps coming. P0740 fixed.
The sky slider sunroof may not open. A software upgrade for the control module is available which should correct this concern.
Putting a chamfer on the cam bearing caps, as specified in a service bulletin, can solve a "high pitch snapping noise" heard when the engine is idling or slightly above idle.