The contact owns a 2016 Jeep Cherokee. The contact stated while operating the vehicle, the check engine warning light illuminated. The vehicle was taken to the local dealer who replaced the drivetrain control module but later the message ‘Service Four Wheel Drive’ was displayed. The vehicle was taken back to the dealer who diagnosed that the PTU needed to be replaced; however, the part was on backorder. The vehicle was not repaired. The contact was informed that the VIN was not included in NHTSA Campaign Number: 23V302000 (POWER TRAIN). The contact stated that the vehicle had experienced the failure listed in the recall. The failure mileage was 110,000.