2020 Hyundai Palisade electrical system problems

“My 2020 Hyundai Palisade experienced repeated instances of the engine cooling fan continuing to operate after the vehicle was completely shut off. In one instance, the fan ran for about 90 minutes after shutdown. After the vehicle was driven again, it ran for approximately another 45 minutes after shutdown. On a subsequent occurrence, the fan continued running until it discharged the battery enough that the vehicle would not start. Southtowne Hyundai in Newnan, Georgia subsequently diagnosed the cause as an internal PCB block failure and replaced the engine-room PCB block pursuant to Hyundai Technical Service Bulletin 26-EE-007H, which addresses battery drain caused by continuous cooling-fan operation after the vehicle is turned off. The dealer installed PCB block part number 91959-S8000-FFF. The failure was intermittent and did not occur every time the vehicle was shut off. My concern is that the defect could unexpectedly discharge the battery while the vehicle is parked, leaving it unable to restart. I am filing this complaint so NHTSA has a record of the failure and can determine whether similar failures are occurring in other Hyundai Palisades.”

“I believe this is related to RECALL 235, Veh was parked on the street, thank god. The Palisade then spontaniusly caught fire, fire department had to be called and insurance company says its a total loss. Fire started in the rear driver side.”

“This vehicle has suffered two identical, catastrophic electrical failures causing an immediate and total loss of engine power while traveling at highway speeds. The first incident occurred after the engine was replaced under a Hyundai extended warranty. The dealership service department blamed that failure on a loose engine ground strap and released the vehicle back to me. On August 3, 2026, the exact same failure occurred for a second time while driving at high speed on the highway. The vehicle lost all propulsion, leaving me exposed to oncoming traffic with zero engine power. The vehicle was towed to a Hyundai dealership. The dealership identified a blown "Sensor 4" fuse causing an intermittent dead circuit, but they have been unable to locate the short circuit after two weeks of troubleshooting. After demanding the diagnostic data logs, the dealership abruptly halted all repairs and ordered me to pick up the vehicle. Furthermore, due to excessive, repetitive diagnostic cranking and idling in 90+ degree heat while under the dealer's care, the vehicle's starter solenoid has now suffered collateral failure. The vehicle is currently completely disabled,…”

“In my 2020 Palisade with automated third and second row seats, the third row automated seat button was accidentally pushed and started to close on my grandchild who was sitting in the third row. The seat did not detect that anyone was sitting in it and kept closing. Luckily I was able to hit the button to stop it. This same problem also happened in the automated second row seat with a grandchild in it. Another [XXX] old child pushed the button on the entry side of the captain’s seat and the seat did not detect that there was someone sitting in it and began to close on them. Once again we were lucky and was standing there and able to push the button to stop it.”

“Was driving 70mph on the highway, all instrument cluster speed gauges go to 0mph and I lose ability to manage speed through cruise control. Was driving blind and had no clue what speed I was going and was extremely worried for my safely. Dealership said my instrument cluster has failed, won’t cover under warranty or as a safety issue. Ridiculous a 80k 6 year old car has a main gauge part fail.”

“I recently purchased this vehicle, and shortly after, it began having serious powertrain issues. When I accelerate, the vehicle intermittently loses power and starts shaking violently. It feels like the engine or transmission is slipping or failing. The RPMs surge and drop rapidly, and the vehicle hesitates, jerks, and sometimes briefly slows down before suddenly accelerating again. This creates an unsafe and unpredictable driving condition, especially when merging or driving in traffic. I’m concerned about a loss of propulsion while the vehicle is in motion. My mechanic indicated the issue may involve the torque converter clutch not engaging properly (possible “stuck off” or circuit performance issue), which would explain the shuddering and inconsistent power transfer. Despite how severe this is, there are no warning lights or check engine light, and no diagnostic codes, which raises concern that the failure is not being detected by the vehicle’s onboard systems. I am also experiencing low and fluctuating engine oil levels even after topping it off and a recent oil change, which may indicate an additional engine-related defect. The vehicle has a clean title…”