2020 Hyundai Santa Fe electrical system problems

“The multifunction/turn signal switch in my Hyundai has failed and causes the left turn signal to operate intermittently. While driving, I am unable to reliably activate the left turn signal when making a left turn or changing lanes. The signal may fail to engage when the turn signal lever is operated, requiring repeated attempts to activate it. College Station Hyundai inspected the vehicle and diagnosed the multifunction switch as the failed component requiring replacement. The replacement component has been identified as Hyundai part number 93400-S1750. I consider this a significant safety concern because the failure prevents me from reliably signaling my intention to turn or change lanes to other motorists. The malfunction occurs during normal operation of the vehicle and creates the risk that surrounding drivers will not know that I intend to turn or change lanes. The vehicle currently has approximately 86,611 miles. I reported the issue to Hyundai Motor America and requested assistance because this is a safety-critical component. Hyundai declined my request because the vehicle is outside the warranty period. I am submitting this complaint because I believe…”

“I went to the store, came home , parked and turned off the car. Went to go outside about 10 minutes ,maybe. Black smoke coming from right front. By the time i grabbed the keys and fire extinguisher there were flames coming from the engine compartment”

“Vehicle experiences severe, intermittent, un-commanded steering inputs from the Lane Keeping Assist (LKA) system at highway speeds (55-70 MPH). The steering wheel violently jerks toward adjacent traffic lanes/shoulders without operator input, lane drift, or warning, requiring immediate high-force manual intervention to overpower mechanical torque and prevent a collision or roadway departure. Chronology of manufacturer notice: - Oct 2024: Initial consumer dispute logs flagged steering safety concerns and unresolved campaign items. - Dec 2024: Opened Corporate Case 24164934, formally alerting consumer affairs to dangerous steering wheel jerking. - Jan 2025: Presented to an authorized dealer; an OTA software update was deployed, but intermittent tracking failures persisted, including failure to recognize lanes at night. - June 2026: Under Case 42680760, the system failed acutely on the interstate, jerking the vehicle out of painted lanes. The malfunction originates in the LKA steering control module and camera hardware, which are intact and available for inspection. Dealerships have not replicated the defect during brief diagnostic windows due to its intermittent…”

“On the morning of February 20 2026 at around 6:35am. I was on my way to work when the engine light started flashing and the speed started to decrease. I was traveling on a major highway in heavy rain with a lot of traffic. I had to put on my hazard lights and quickly pull off the road. The code given is P1326 which has to do with the engine and wiring harness. I just purchased the vehicle on Jan. 17 2026. The Carfax stated no open recalls.”

“Unknown Sometimes when i stop the vehicle the engine shuts off and wont come back on until i put the car in park and turn the ignition off. Not safe at all when your in heavy traffic”

“2020 Sante fe with 59000 miles on it. Air stops blowing cold, I look it up and there is a TSB for the Evaporator Temperature Sensor from May of 2021. This is a safety issue because if you run the air conditioning or defroster if the sensor is bad it clicks off the compressor which can affect the fan and overheat the car. I watched it happen on my car when they ran the diagnostic trying to fix it. It came up as a bad sensor, and it clicked off the compressor. The fact that a 6 year old car with 59000 miles needs work on an air conditioner is ridiculous and in this case not safe.”