2019 Jeep Grand Cherokee: adaptive cruise control problems

Filed May 30, 2025 · Electrical · NC

In the cold weather, usually under 40degrees, sensors come on alerting me that stablisation is disabled, auto start/stop is disabled, check engine light comes on, parking brake illuminates and does not turn off while driving, cruise control does not work, radio information cluster intermittently works etc. It's seems to be all electrical. I have taken it to the dealership several times and they can't figure out what the issue is. At first they said the auxiliary battery was bad and I paid over $400 for a new battery and still have the same issues.

Filed Jan 24, 2025 · Acceleration, Driver assistance · VT

Electronic stability control, check engine and ABS lights are all on. This effects not only my ESC- I have gone out of control multiple times in bad weather, but because of this the cruise control and the automatic starter on my vehicle do not work either. I live in northern VT where winters are tough. ESC needs to be working properly to prevent potential for crash. I have come close several times this winter to going out of control. Also very annoying that the convenience items do not work. Lastly- these lights have been showing on the dash since last summer. I wanted to trade the vehicle in about this time and still do for a different vehicle but can not because of the dash being lit up. This is causing significant financial impact on my household as the vehicle is depreciating day by day and I would certainly not get what its worth with a dashboard full of mechanic error lights.

Filed Dec 8, 2023 · Brakes, Driver assistance · MI

Our 2019 Jeep Grand Cherokee started to exhibit the following conditions: brake lights remained ON, ESC failure, AutoPark Failure, Cruise Control failure, vehicle started without depressing the brake pedal. I researched possible recalls and found Z48 for HCU/ABS module failures. Our vehicle was in the recalled build dates. We took it to Palace Chrysler Jeep Ram Inc. in Lake Orion, MI for repair. They "reflashed" the software, cleared the fault codes and returned the vehicle to us. In 3 key cycles, the failures returned. We took the car back to the dealership. They stated that the reflash wasn't done correctly. (blamed machine error) Reset the fault codes and in 3-5 key cycles the problem returned. Now on the third try, the dealership replaced the HCU/ABS module and charged us $1,100 for the repair. We requested reimbursement from Stellantis and have been denied 3 times. This is completely unacceptable since the Recall Z48 is for this exact problem. Also, it proves that their SW reflash doesn't fix the problem in some vehicles. We want Stellantis to reimburse us for this repair.

Filed Mar 29, 2022 · Driver assistance, Electrical · NH

I have a 2019 Jeep Grand Cherokee Trailhawk currently around 33,500 miles. I bought this vehicle new and have been having issues with it since I got it. I hear electrical crackling and popping throughout the cabin, mostly in the dashboard. I thought at first it was the adaptive cruise or forward braking system engaging, but the sound seems to be completely random. A common symptom is the speakers, microphones, and speaker-based safety alerts are completely cut out. If I'm on a call, the person on the other end will not be able to hear me until the speakers come back. Some of the systems that do not work as intended include: -- Radio/SiriusXM/Apple Carplay/Android Auto (No sound) -- Uconnect Voice Command (No Sound/Mic) -- Parking sensors (no proximity alerts) -- USB Ports (slow charge and do not recognize phones) -- Forward Collison Alerts (No Sound) -- Navigation Alerts (No Sound) -- Blind Spot Alerts (No Sound) I've tried the system with the following phones (with OEM and high-quality aftermarket wires) on AT&T, Verizon, Mint: -- iPhone XS -- iPhone 12 -- iPhone 13 Pro Max -- Samsung Galaxy Note 8 -- Samsung Galaxy Note 20 -- Samsung Galaxy Note 22 -- Samsung Z Flip My Jeep has the Panasonic Uconnect system. I've attached pictures of the type & IMEI etc. This issue causes a direct safety concern when an alert doesn't activate or a when the loud electronic distortion comes through the speakers that will cannot be turned off—causing me to have to pull over and turn the car off for the sake of my hearing.

Filed Jun 16, 2021 · Electrical, Transmission · MA

I was driving around 75mph on the interstate for about an hour (not using cruise control) when all of a sudden the accelerator no longer worked. There was no warning, no error lights or codes or anything. I tested the brakes and they still worked. I was able to coast to a stop on the breakdown lane. I waited about 20 seconds and restarted the car and everything worked again. This is my son's car that I was driving and it's really concerning because I thought I bought a safe car for him. I'm an experienced driver, but either way it's extremely dangerous. I looked information up about this issue and I guess it's been happening quite a bit according to the internet. Someone mentioned that the 4 PCM torx head t15 mounting screws that hold the PCM faceplate to the protective metal case where the circuit board is housed are too long. (Not the 3 bolts that hold the PCM to the mounting bracket) When there was a vibration or shift, the screws touched the circuit board shorting everything out and causing the engine to stall. The owner put washers with the 4 little t15 screws and were able to fix the problem. I think there needs to be a recall. I'm afraid to drive the car myself or have my son drive it. I'm taking it to the dealer, but I don't think they'll be able to recreate the situation.

Filed May 16, 2019 · Acceleration, Engine · 9,700 miles · NC

Vehicle lost power on highway @ 65 - 70 MPH. Operator was using cruise control to increase and decrease speed in heavy traffic. Operator pressed the cruise off button and the vehicle lost power to idle and would not accelerate. Operator pulled over and switched the vehicle on and off several times over about 5 minutes before vehicle wold operate normally again.

Filed Mar 19, 2019 · Acceleration · 425 miles · NY

The gas pedal became stuck when I was driving around local streets. I was stopping my truck because I was coming up to an intersection. When I lifted my foot from the gas pedal it did not come up. Almost as if the cruise control was engaged. It was scary and I went a little too far into the intersection with my foot on the brake.