2012 Jeep Grand Cherokee: misfire or rough idle

Filed Jan 26, 2023 · Fuel system · TX

My Grand Cherokee started idling rough, then developed a misfire and often times while driving it would just die even while driving on the highway. It almost caused me to have an accident on two occasions. I learned on the federal safety agency website my Jeep had an open recall and I contacted my local Jeep dealer only to have them tell me that the parts needed to perform the repair were "restricted"

Filed Dec 20, 2022 · Electrical · 110,800 miles · NC

The contact owns a 2012 Jeep Grand Cherokee. The contact stated that after starting the vehicle, the vehicle was idling rough idle almost causing the vehicle to stall. The contact stated that while depressing the accelerator pedal, the vehicle seemed to operate and run normally. The contact stated that the check engine and the electronic throttle control warning lights illuminated. The contact stated that after shifting into drive(D) and accelerating to approximately 10 MPH, the vehicle hesitated, revved, and then lunged forward. Additionally, the contact noted that the vehicle had been consuming an unusual amount of coolant that required him to add about one gallon of coolant per month. The contact stated that there was no leaks or puddles of coolant around the vehicle when the vehicle was parked in the driveway. The contact had driven the vehicle to an independent mechanic who attempted to download data from the computer but was unable to find any failure data on the engine "DTC" data. The mechanic retrieved fault code number: P0627 (PCM Engine Control Module). The independent mechanic was unable to repair the vehicle. The contact stated that the independent mechanic researched online and related one of the failures to the federal safety agency Campaign Number: 19V813000 (Electrical System). The manufacturer had not been informed of the failure. The failure mileage was approximately 110,800.

Filed Oct 11, 2022 · Engine · 50,000 miles · CT

The contact owns a 2012 Jeep Grand Cherokee. The contact stated while driving approximately 30 MPH, the check engine warning light illuminated. The contact had an emissions test scheduled and failed due to the check engine warning light. The contact stated that the vehicle engine was idling roughly. The contact had taken the vehicle to an independent mechanic, where it was diagnosed and determined that the number two cylinder had been misfiring and needed to be replaced. The independent mechanic referred the contact to a dealer where she had been advised that there had been a manufacturer recall associated with the VIN, however, the recall warranty had expired. The vehicle had not been repaired. The manufacturer had been informed of the failure. The failure mileage was approximately 50,000. The contact stated that they were never notified of the extended warranty for the vehicle.

Filed Oct 19, 2021 · Engine · FL

I went to the dealership and was informed the fuel pump relay recall is not available. My Jeep Has been misfiring, stalling, vibrating, and I am smelling gas fumes when I drive.

Filed Nov 9, 2020 · Engine · 93,800 miles · CA

The engine light is illuminated so we took it for diagnosis to a jeep/chrysler dealership for diagnosis. The diagnosis for my vehicle is low compression in cylinders #1 and #2 causing a misfire. The code is p0302. The irony of this diagnosis is that chrysler knows all about this problem and has issued a cylinder head extension warranty for only the left side of the engine. Meaning that chrysler will repair the left side (under warranty) but will not warranty the right side of the engine that suffers from the same problem. Cylinder #1 is covered by the extended warranty 10 years 150,000 miles and cylinder #2 was covered under the original power train 5 years 100,000 miles and we are still under 100,000 miles on the vehicle. Unusual wear and failure in the upper cylinders and valves are pervasive problems with 2011-13 jeep grand cherokees with this engine I was advised by the technician at larry miller chrysler that lkq and c&k do not offer aftermarket engines for this make and model so the factory motor seems to be our only hope. We have submitted a claim to chrysler corp and am getting their "generic automatic email that states our clain has been closed". One representivae even asked us to submit the stamped work order and any receipts, which we did 10 days ago. Today we called to ask about our claim and are being told it has been closed and they have not goven us any explanation other than it is outside the warranty. How can 1 side of the engine be covered but the other side is not? We basically have to pay for a whole new engine and labor costs to the tune of $8,000. This vehicle has already had multiple recalls and repairs and we are devastated at this point because this engine issue is emotionally and financially ruining our family.

Filed Aug 31, 2020 · Electrical, Fuel system · 130,000 miles · MD

Vehicle shuts off after starting, ticking from engine at random speeds, runs rough at random speeds during different times. I took it to my dealer because of this and they said that it sounds like the fuel pump relay is failing and can cause me to crash/stop in the middle of the road suddenly and that theres been a recall for this for almost a year but they cant help me or fix my car because theres no parts. I am now afraid to drive at all

Filed Aug 6, 2020 · Engine · OK

At approximately 120k miles I began to notice a slight tick coming from the driver side of the motor. Over the next 5k miles I changed the oil several times, swapped plugs, coil packs and injectors to rule out any potential issues. I also did a visual inspection of the exhaust manifolds. The problem persisted and got worse. There was also a consistent hesitation under medium to heavy throttle input. I'm now at 126k miles and had a check engine light - p0303 for cylinder 3 misfire. I have started disassembling the motor and noticed the lifter has seized and started destroying the camshaft.

Filed Mar 3, 2020 · Engine, Fuel system · 60,000 miles · CA

Vehicle has no diagnostic codes showing up but has stalled on us several times almost causing accident twice now. Also pulsates at speeds around 45 and again at 60mph. Since the last stall it now has a very rough idle. We have called dealership about recall and they state yes there is one but they do not have a fix. Are we supposed to just keep driving with these safety issues ? Vehicle will stall while after driving coming to a stop at light. We lose steering ability and braking. We are usually going straight and on city street or coming off freeway

Filed May 10, 2019 · Engine · 38,705 miles · GA

Tl* the contact owns a 2012 jeep grand cherokee. The contact stated that while driving at approximately 45 MPH, the check engine warning light illuminated and the vehicle stalled. The contact was unable to restart the vehicle. The vehicle was towed to athens dodge chrysler jeep ram (4145 atlanta hwy, athens, ga 30606, (706) 549-7555) to be diagnosed. The contact was informed that the transmission cooler, atf (automatic transmission fluid) needed to be replaced, there were multiple cylinder misfire, camshaft position sensor and the spark plugs needed to be replaced. The vehicle was repaired however, the failure recurred. The contact stated that the failure recurred four times. The manufacturer was contacted but no further assistance was provided. The failure mileage was 38,705. The VIN was not available.

Filed Dec 3, 2018 · Engine · 161,334 miles · LA

I bought this vehicle used & no problems until the recalls come rolling in but had a cylinder 2 misfire at 132,000 miles ok contacted dealership & it was fixed, but found out this was the 2nd time this has happened amongst finding out the whole engine had to be replaced from the factory. I'm now 161,334 miles & have a cylinder 2 misfire again. If it fails compression test again this will be a 3rd time the head has failed & I'm past jeep's extended warranty to cover it. Apparently jeep has not fixed their flaw. It spits an sputters, idles rough sometimes & I always do my maintenance when it's needed. It does it when I'm mostly parked but I can feel it when I'm stopped & idling.

Filed Dec 31, 2017 · Engine · 60,000 miles · CA

At approximately 60,000 miles, both engine mounts failed. The problem presented as a rough idle condition but was actually the motor mounts.

Filed Mar 22, 2015 · Brakes · 31,000 miles · MA

As I was backing out of my driveway today my brakes failed, and when I say failed I mean I had no brakes at all. I cannot tell you how frightening this was. I managed to stop the car by shifting it back into park. I was able to do this because I was not going very fast. Since 2/12 (time of purchase) until 8/14 I have received 3 recalls (cylinder misfire, brake booster and sun visor wiring) on this brand new vehicle! I received the brake booster recall in the summer of 2014. It took a few months to get an appointment to have it fixed because of lack of parts in stock. I finally got an appointment on 10/8/14 at kelly jeep, lynnfield, ma (place of purchase) to have both the brake booster and the sun visor wiring repaired. The cylinder misfire was repaired before this time and before I actually received the recall because of problems I was having with the engine. After the brakes failing me today, I am grateful that I was not on the street/highway, that none of my children were driving the car or I was not driving someone else's child in a carpool. This does not change the fact that if the brakes failed just a couple of minutes later I could have been killed or even worse, have killed someone else, for the failure of the brake booster that was supposedly fixed on 10/8/14.