Huge win for car owners! All TSBs to be made public. The Center for Auto Safety just made the NHTSA (US Government) make public the full text of all TSBs from now on. They are the same organization that has petitioned the NHTSA & filed lawsuits to protect car owners over exploding gas tanks & other major safety issues. Whenever you drive in your car, you are safer thanks in part to a lot of work over the years by this small but very effective consumer advocacy group.

Please take a moment & say thank you by donating $5 or whatever you can to the Center for Auto Safety. Notes: The 2012 Grand Cherokee hasn’t seen the same complaint volume as the 2011, at least not yet.

It’s worth noting both model years are part of a class-action lawsuit that focuses on a defective TIPM and a long wait for replacement parts.

The 2012 also received national attention after it failed a Sweedish Magazine’s “moose test”. the test measures a vehicle’s ability to swerve out of the way of an obstacle you wouldn’t want to hit while driving down the road … like a moose.


really awful
Crashes / Fires:
3 / 0
Injuries / Deaths:
2 / 0
Average Mileage:
28,830 miles

About These NHTSA Complaints:

This data is from the NHTSA — the US gov't agency tasked with vehicle safety. Complaints are spread across multiple & redundant categories, & are not organized by problem.

So how do you find out what problems are occurring? For this NHTSA complaint data, the only way is to read through the comments below. Any duplicates or errors? It's not us.

2012 Jeep Grand Cherokee engine problems

engine problem

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2012 Jeep Grand Cherokee Owner Comments

problem #18

Feb 112016

Grand Cherokee

  • 95,000 miles


Vehicle stalls when applying brakes while decelerating. All power is lost and very difficult to steer or brake. The vehicle will restart when put back into park after drifting to a stop. This is a random problem that occurs 1-2 times every couple of weeks on average. The problem has been reported to Jeep and has been at the dealer several times but they cannot reproduce the problem and there are no engine codes being generated. This is a very dangerous hazard and I have simply been lucky I have not been in a serious accident yet as a result.

- Toms River, NJ, USA

problem #17

Sep 282015

Grand Cherokee

  • 120,000 miles
The contact owned a 2012 Jeep Grand Cherokee. The contact stated that when the vehicle was parked and shifted into reverse, the vehicle accelerated rapidly without warning and crashed. The contact suffered a fractured nose that injured the sinus cavities and a fractured rib. Medical attention was required. A police report was filed. The vehicle was destroyed and towed. The manufacturer was not made aware of the issue. The failure mileage was 120,000. Updated 05/10/16

- Mansfield, MA, USA

problem #16

Jul 222015

Grand Cherokee

  • 51,000 miles
There is/has been continued issue with the 2012 Jeep Grand Cherokee not starting and/or ignition getting stuck in starting mode. When the ignition is evidently started after several attemtps the speed control excells to maxed rate including RPM rate while in parked state or driving and upon breaking it did not stop the increased speed until 1 minute or more later (very scrary).

- Tulsa, OK, USA

problem #15

Jan 232015

Grand Cherokee

  • 38,000 miles


The contact owns a 2012 Jeep Grand Cherokee. The contact stated that while driving approximately 30 mph, the accelerator pedal fractured. The contact merged to the side of the road. The vehicle was towed to a dealer. The technician was unable to diagnose the failure. The manufacturer was not made aware of the failure. The vehicle was not repaired. The failure mileage was 38,000.

- Millwood, NY, USA

problem #14

May 212014

Grand Cherokee

  • 25,000 miles
TL- the contact owns a 2012 Jeep Grand Cherokee. The contact stated that while driving at various speeds, the vehicle experienced an unintended acceleration. In addition, the engine revved but failed to accelerate on several occasions. The contact stated that NHTSA campaign number: 14V154000 (service brakes, service brakes, hydraulic) was received in may of 2014, NHTSA campaign number 14V391000 (electrical system) was received in August of 2014 and NHTSA campaign number: 14V636000 (electrical system) in December of 2014. The dealer informed that the parts were not available and no estimated date for receiving the parts could be given. The vehicle was not diagnosed or repaired. The manufacturer was not notified of the failure. The failure mileage was 25,000. Djr

- Everette, WA, USA

problem #13

Jun 272012

Grand Cherokee

  • 3,525 miles
TL-the contact owns a 2012 Jeep Grand Cherokee. The contact stated that while attempting to stop, the vehicle violently accelerated and excessive force was required on the brake pedal. The failure recurred on numerous occasions. The vehicle was taken to a dealer where the failure was unable to be duplicated. The vehicle was not repaired. The manufacturer was notified of the failure. The approximate failure mileage was 3,525. Djr

- Scottsdale, AZ, USA

problem #12

Apr 172014

Grand Cherokee 4WD 6-cyl

  • 43,000 miles


My 2012 Jeep Grand Cherokee Laredo has stalled when turning on and has often not turned on. When driving the vehicle the car has shut off almost causing an accident.this has happened on many occasions. The car accelerates often when driving the lights, airbag symbols, etc turn on erratic. I had to replace the alternator and battery due to faulty timp which Jeep has recalls on however not my year although-my car has the same problems which I have to pay for and I have researched and many other Jeep owners have the same issues and Jeep is very aware and are not taking responsibility, I feel unsafe driving this car especially with my children, the car is unreliable and have been late to work due to the car stalls and lack og turning on. This car has a mind of its own starts when it feels like it, speeds up on its own, lights turn on off, tells U keys left the car when it hasn't. very angry at Jeep I should not have to pay for faulty equipment due to your negligence!

- Brooklyn, NY, USA

problem #11

Oct 082014

Grand Cherokee 4WD 6-cyl

  • Automatic transmission
  • 53,000 miles
The contact owns a 2012 Jeep Grand Cherokee. The contact stated that while parking with the brakes engaged, the vehicle erroneously accelerated and traveled over a bush, a hill, crossed a four lane road and then crashed into a tree. The contact indicated that the air bags failed to deploy and the engine continued to rev after the contact exited the vehicle. The contact then removed the key to shut off the engine. The contact suffered a bruised chest during the incident but did not require medical treatment. A police report was taken at the scene. The vehicle was not diagnosed or repaired. The manufacturer was not notified. The failure mileage was 53,500. Updated 11/21/14 the consumer stated the vehicle was put in park, before she exited, with the engine still running. Updated 12/02/14

- Raleigh, NC, USA

problem #10

Jul 012014

Grand Cherokee

  • miles
Letter from congressman barber on behalf of constituent regarding a mechanical malfunction with his 2012 Grand Cherokee overland; attn: Taj sultan. The consumer stated on occasion, he would brake and accelerate simultaneously to avoid rolling backwards. He soon discovered, while doing so, with the Jeep, it would creep a few feet into the intersection, and there would be no acceleration for about five seconds.

- Tucson, AZ, USA

problem #9

Sep 102012

Grand Cherokee 8-cyl

  • 500 miles
Multiple incidents - stopped at corner heading uphill. Happened to touch both brake and gas pedals at the same time. I found that when going into the intersection at the change of light, no gas (propulsion) for approx. 5 seconds. Complained to service mgr. He advised he had heard this before and would contact Chrysler. Never heard from him again. Over the two years this problem occurred about 4 times. I have since been told that Nissan has also engineered this into their cars as if this makes it right.

- Tucson, AZ, USA

problem #8

May 032014

Grand Cherokee 6-cyl

  • 20,000 miles


Jeep was turned on while brake was applied. Engine began to rev, Jeep then lurched forward while brake was still applied. Jeep came to stop approximately 40 feet from where the Jeep was turned on. It was a scary ride, no control over the vehicle.

- Anchorage, AK, USA

problem #7

Nov 012013

Grand Cherokee

  • 35,000 miles
I was driving my Jeep from a stop sign and it all of a sudden slowed down and would not accelerate. The engine light comes on and forces me to pull over, restart it and it runs fine after that. Well, it's happened 3 times after this and I have arranged a 7am service for it on Monday. The book says check the gas cap or it may be bad gas, but I burned the gas down to 15 miles left and filled it with super unleaded. No matter what I do, like shift into N, rev the engine, nothing works until I pull over and restart it.

- Coolidge, AZ, USA

problem #6

Jun 032013

Grand Cherokee 8-cyl

  • 10,900 miles
Problem developed just after 10,000 miles with mild vibration on acceleration. Problem persisted and got worse. I had vehicle checked by dealer and head mechanic at 15,000 when in for oil change. Definitely was a problem, took a day to diagnose with help from Jeep. /Chrysler said it was failure of the transfer case/drivetrain control module. It took from June 25 until August 19 to obtain new module. During that time vehicle vibration worsened further requiring backing off on acceleration and then continuing acceleration to get up to highway speed. Very much like riding on a bad washboard road plus noise coming from under front and then additional noise from rear. When going up moderate inclines back end began strongly vibrating to the point where it felt back end was going to start hopping plus a clunk noise. Backing down acceleration and then reaccelerating would lessen problem but still made vibration. Final cause after repair: Cause listed as broken propeller shaft with universal joints, replaced transfer case to rear axle; replace rear prop shaft due to carrier bearing failure causing vibration; replace final drive control module per diagnosis for shuttering in driveline. Vehicle has 17,578 miles at repair completion. Problem appears fixed in the first 500 miles I have driven since repair.

- Conifer, CO, USA

problem #5

Jan 172012

Grand Cherokee 4WD 8-cyl

  • 40 miles
The contact owns a 2012 Jeep Grand Cherokee. The contact stated that the vehicle surged forward abnormally when first started. The failure would also occur while the vehicle was engaged in park. The contact stated that the anti-lock braking system and the four wheel drive warning lights illuminated when the failure occurred. The vehicle was taken to the dealer several times and the manufacturer sent several engineers to further inspect the failure. The manufacturer was not able to determine what caused the failure. The vehicle was not repaired. The failure mileage was 40 and the current mileage was 2,000. The consumer stated his foot was on the brake, when the vehicle lurched forward. Updated 01/07/13

- Superior , CO, USA

problem #4

Sep 072012

Grand Cherokee 6-cyl

  • 9,210 miles
Cold started vehicle. Waited for fast idle to subside (cool weather). Placed in drive and slowly accelerated into garage, appr 30 feet. Braked vehicle to full stop. Vehicle seemed to be under some level of power, more than idle speed with no acceleration by driver. Began to shift out of drive and once the shift lever was in the neutral slot, the engine rpms increased to about 4000 RPM. Engine was shut down in neutral to avoid shifting into park at high RPM. Second occurrence on 15nov2012, same situation. Contacted local dealer (bb - Chrysler Jeep) (16nov2012 0931), spoke with pm - service consultant who stated that there were no recalls or service bulletins on this vehicle for acceleration type problems. He recommended to bring in for inspection if it happens again.

- Leesburg, FL, USA

problem #3

Aug 032012

Grand Cherokee

  • 10,000 miles
The contact owns a 2012 Jeep Cherokee. The contact stated that while at a stop light, he felt the vehicle accelerated independently. He keep his foot on the brake and turned off the vehicle and turned it back on and the vehicle reset. The vehicle was taken to the dealer for a diagnosis. The dealer stated they could not find a failure. The manufacturer was not contacted. The failure and the current mileage was 10,000.

- Chatsworth, CA, USA

problem #2

Jan 052012

Grand Cherokee

  • 560 miles
Yesterday, 5 Jan 12, as I approached a stop light I removed my foot from the gas and applied the brakes. The vehicle did not slow down as expected. It was as if the engine was fighting me. I put the car into neutral and the rpms shot up to about 5000 and then went back down. The cruise control was not engaged and my foot was on the brake, not on the gas. Today, as I was coasting towards an intersection, foot off the gas, I stepped on the brake and again the engine revved up causing me to have to press very hard on the brake to stop. After no more than one or two seconds the problem disappeared. This could easily cause a serious accident.

- Lake Oion, MI, USA

problem #1

Dec 182011

Grand Cherokee 6-cyl

  • 4,200 miles
I was going approximately 20-25 approaching a signal light. I let off the gas and applied the brake as the light was red. As I let off the gas, the engine began to rev higher and as I applied the brake I had to apply it harder and harder as the engine continued to rev even higher. I began to smell the brakes burning as they tried to hold the car back. Fortunately I had the foresight to put the car in neutral. It continued to rev for about 5 seconds and then went down to normal. It has happened once. No warning lights went on. The dealer said that they contacted the detroit technical bureau and they suggested that maybe it was the floor mat, or my foot, etc, etc but claimed they had no other reports of this occurring. I don't have carpets as I opted for the rubber mats and they sit tight to the floor. And my foot was not stuck on the gas. I was conscious of the fact that my foot was on the brake and not the gas as I was trying to figure out what the heck was going on. They said they drove it and did computer checks and had no explanation. The service rep said the response from the technical bureau would be "insulting to me". the dealer was bradshaw Jeep in watertown, ct and the service rep was victor. I wrote this out on the service order and kept a copy.

- Watertown, CT, USA

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