2018 Jeep Cherokee electrical system problems

“I have a 2018 Jeep Cherokee. The exact component causing the problem is UNKNOWN. While driving, a “Service Shifter” warning appeared on the dashboard and all of the gear indicator lights illuminated at the same time. After I turned the vehicle off and restarted it, the warning disappeared. On a separate occasion, a “4WD Service Unavailable” message appeared along with the SVC 4WD warning light. That warning also later disappeared. I am concerned about my safety because these warnings involve the vehicle’s shifter and four-wheel-drive system, and I do not know whether either system could malfunction while I am driving. The vehicle has not been inspected or diagnosed by a Jeep dealer or independent repair facility for this problem yet. I took the vehicle to Advance Auto Parts, where they connected a diagnostic scanner, but no codes were found with their scanner. The warnings have been intermittent and have disappeared after restarting the vehicle. There were no other symptoms that I noticed before the warnings appeared. The exact cause of the Service Shifter and SVC 4WD warnings is UNKNOWN.”

“while i was driving my vehicle put the parking brake on and then i was unable to get it deactivated at first, after a few seconds i got it and moved forward in traffic. after a few feet the vehicle put the parking brake on and i was unable to move once again. this was in the middle of traffic and i ended up blocking the single lane road. I called a family member who was near by and they came and some how got the parking brake off and drove me and the vehicle home. my safety and everyone one around safety was jeopardized because they had to go into oncoming traffics lane to pass me until i got moving. parking wouldn't engage when we got home and service parking brake light was on.”

“When the running lights and headlights are set to Auto, moving the lever to High Beam causes the lights to go out. I have been asking the dealer and trying to find a solution since buying the car new, but no recall had been issued for my VIN and the dealer will not correct the problem with a recall specific to my VIN and year/model. There is a known issue with the Smart Lighting Module that prevents the High Beam from activating and shuts off the headlight in the Auto position, and a software update has been issued for the newer models, but not for the 2018 Cherokee with the same software.”

“While driving, often at highway speeds, all of the lights on the shifter will light up and the dash will display "Service Transmission." I took it to the dealer several times and their response has been that it is a software issue that they do not have a fix for and that I should stop the car, turn the engine off, open and close the door and then restart the car. This does temporarily reset the display but doing this on the highway poses a safety problem in trying to get to the shoulder in traffic.”

“The rear defroster or related electrical wiring in the rear glass/liftgate area appears to have malfunctioned and shorted, causing a fire while the vehicle was parked, turned off, and unattended. The fire resulted in the rear glass shattering/blowing out. The incident was recorded on a residential security camera. This posed a significant safety risk because the fire started while the vehicle was off, creating danger to occupants, bystanders, nearby vehicles, and surrounding property. There were no prior warning indicators, messages, or symptoms known before the failure. A dealership has inspected the vehicle and provided a repair estimate consistent with failure in the rear defroster/rear glass area. The vehicle and damaged components should be available for inspection. Based on the observed damage and location of the fire, this appears to be an electrical short involving the rear defroster system or related wiring.”

“The contact owns a 2018 Jeep Cherokee. The contact stated while operating the vehicle, the instrument panel light, dome light, and center console continuously flickered off and on with the battery voltage charge erroneously fluctuating up and down from 10 to 14 Volts. The vehicle was taken to the local dealer who replaced the alternator, but the failure persisted. The vehicle was taken back to the local dealer who determined that the PCM was faulty and needed to be replaced. The vehicle was not yet repaired. The manufacturer was notified of the failure, but no assistance was provided. The contact was informed that the VIN was not included in NHTSA Campaign Number: 18V524000 (ELECTRICAL SYSTEM). The contact stated that the vehicle had experienced the failure listed in the recall. The failure mileage was 133,000.”