Otherissues can include electrical faults within its circuit. Exhaust leaks may also cause this problem. Another problem that the Grand Cherokee is known for is P0123. This code indicates that a high voltage has been detected from the throttle position sensor. Owners have found that replacing the sensor is one of the best ways to fix this issue. Picka Powertrain. Right out of the gate, models equipped with Chrysler’s entry-level 3.6-liter gasoline V6 or the optional 5.7-liter Hemi V8 gain electrically assisted Outsideof bad fuel injectors, a bad fuel pump or fuel filter can also cause a jerk while accelerating. When either of these goes bad, there is insufficient fuel pressure at the fuel rails. The best way to determine if there’s a lack of fuel is to test the fuel pressure at the rails. 5. Air System. 2016Grand Cherokee Overland EcoDiesel issues. We purchased this GC about 3 months ago. We decided on a diesel for fuel economy because we want to do some traveling once we're able to retire. For now though, we're still working. Shortly after 62Complaints: 2016 Jeep Grand Cherokee Engine Problems. Jeep » Grand Cherokee » 2016 » engine » December 13: Jeep Compass 'Coolant Temperature Too High' JeepWK2 Lover, Hilliard, OH, 03/24/2017. 2016 Jeep Grand Cherokee High Altitude 4dr SUV 4WD (3.6L 6cyl 8A) The High Altitude with the Hemi and sport mode is addictive. 2nd GC I've owned, and the 2016Jeep Grand Cherokee - High Altitude, 3.6L Pentastar® V6 engine , 4x4, Granite Crystal. Save Share. Just got my JGC diesel back from the dealer with an entire new fuel system due the the diesel fuel pump failure. Took 3 weeks to get the parts in and a week to replace. No rental car for a month. Havea 2016 Jeep Grand Cherokee with 3.0 Diesel. FCA Recall Z46 re "high pressure fuel pump ("HPFP") that could fail prematurely. A HPFP failure may introduce internally failed component debris into the fuel system potentially causing fuel starvation. Fuel starvation may result in an unexpected loss of motive power, which can WnGIx.