In Limp Mode once more
I'm not sure Hyundai really knows what the issue is . I had the ecu update done a month ago, and all was fine. The family and I headed out for vacation on Saturday June 8 and my 2014 Santa Fe Sport went into Limp Mode about 10 minutes into our drive. I managed to drive it to the nearby Hyundai dealership in Marietta, GA. After running numerous tests they replaced the Knock Sensor wiring harness and properly torqued down the knock sensor (car was failing tests after harness replacement because the knock sensor was not torqued to specs). I was told the car was good to go and we were on our way 3 hours after limping into the dealership. About 2 and a half hours later, the car went into limp mode again. I drove another 40 minutes on back roads to the nearest Hyundai dealer in Augusta, GA. Unfortunately, the service department was closed for the day and would not be returning until Monday. We left the car, got a rental, and drove to my in-laws in Virginia Beach. On Wednesday I received a call from the dealer stating they had contacted Hyundai and determined the engine wiring harness needed replacement. We picked the car up on Saturday, the 15th after the work was completed and drove home to Marietta, GA with no issues. After unpacking, I went back out to the grocery, and BAM...Limp Mode AGAIN. I drove it back to the dealer in Marietta. I received a call from the dealer last night. They said the car is testing fine and wanted to know if I would let a tech drive it home with diagnostic equipment hooked up...and I agreed. I received a call this morning stating the tech had no issues. They then asked me about the power inverter that was hard wired to the battery. I informed them it was installed by my buddy's Hyundai dealership in 2014, and I hadn't used it/turned it on since late last year. Their thinking is that the inverter is causing electrical interference that is triggering the knock sensor. They now want to unhook the inverter and test drive my car again, today. I am sure I will receive a call stating all is well and I need to come and pick up my vehicle. Now, when I get behind the wheel, I will be waiting for Limp Mode to kick in again. It is not a matter of if it will happen, but when it will happen. I will keep you all updated on what happens next. As I said earlier, I'm not sure Hyundai really knows what the issue is. Every tech I have talked with has said the same thing in one way or another.