Here's some interesting info if this should happen to you. I have a '23 Santa Fe hybrid with just under 3,000 miles. Everything has been flawless, with a long trip included. Parked last Monday night. Hit the go button on Tuesday afternoon to run an errand, got multiple dash lights and warning messages. These messages and lights would go off and on each stop/go sequence. The warnings were something like "check side safety" and "check front safety" and "check brake fluid" (my memory not so good, so may vary from these.) It also triggered an alert to BlueLink. This showed two codes: C136081 and C174191. These are both "Chassis" codes. To be sure they were valid, I reset them, they came back immediately. A day later, the code C186286 came on, but it reset itself. After a couple of days (while waiting on a callback from the dealer), the on/off stuff didn't occur every stop/go event. That was nice, since the chime for each notification was annoying. I also was getting notices from BlueLink to my phone of these events.
So, while installing my spare tire from the parts I bought thanks to the efforts of some of you guys, I had an idea of sorts. This being a new car, I had only looked under the hood to admire a clean engine bay. I raised the hood and checked the brake fluid level, and it was below the "low" mark! Run to Advance and got a bottle of DOT4 and filled it to an inch under "full". (Side note: don't pour it in normally, it'll run that fill neck over fast. You have to let it percolate down.) Anyhoo, got in turned it on, and all the lights and warnings were gone, except for the check engine light. And that went away after a few on/offs of the ignition.
Later I got that return call from the service dept. at my dealership. We had a nice talk on the events. He cautioned me to observe the braking action and fluid level for a while. I chastised Hyundai for either shipping them a car with low fluid and also them not catching it on the delivery inspection. He agreed, for what that's worth. I'm hoping that is the true cause. I didn't see any evidence of fluid leakage but will look with a light next time.
I asked why there were so many warning lights for something that simple, and he couldn't answer other than to offer that it sounded like anything speed related was affected.
I was careful on that first drive to make sure things worked and there were no safety issues. Lane assist worked, but lane keep and smart cruise control did not. All cameras worked, along with collision avoidance and parking assist. It blitzed all radio and seat settings for all users. All hybrid functions were normal.
Thanks for listening!
Ron
So, while installing my spare tire from the parts I bought thanks to the efforts of some of you guys, I had an idea of sorts. This being a new car, I had only looked under the hood to admire a clean engine bay. I raised the hood and checked the brake fluid level, and it was below the "low" mark! Run to Advance and got a bottle of DOT4 and filled it to an inch under "full". (Side note: don't pour it in normally, it'll run that fill neck over fast. You have to let it percolate down.) Anyhoo, got in turned it on, and all the lights and warnings were gone, except for the check engine light. And that went away after a few on/offs of the ignition.
Later I got that return call from the service dept. at my dealership. We had a nice talk on the events. He cautioned me to observe the braking action and fluid level for a while. I chastised Hyundai for either shipping them a car with low fluid and also them not catching it on the delivery inspection. He agreed, for what that's worth. I'm hoping that is the true cause. I didn't see any evidence of fluid leakage but will look with a light next time.
I asked why there were so many warning lights for something that simple, and he couldn't answer other than to offer that it sounded like anything speed related was affected.
I was careful on that first drive to make sure things worked and there were no safety issues. Lane assist worked, but lane keep and smart cruise control did not. All cameras worked, along with collision avoidance and parking assist. It blitzed all radio and seat settings for all users. All hybrid functions were normal.
Thanks for listening!
Ron
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