Turn signal hyper flash?

Does this car have LED's or has the bulbs been replaced with LED's? If the bulbs have been replaced with aftermarket LED's this is your problem. You must have the correct bulbs to supply the correct resistance or the blinkers will cycle to quick. I would replace the bulbs at the both the front and rear even if they work. I have seen bulbs work even though the resistance is off. Please let me know.

If the bulbs are working replace them anyway. The BCM controls the bulb operation and if the resistance is wrong they will blink to fast. This can can tell you more.

https://www.2carpros.com/articles/turn-signals-blink-rapidly

Please go over this guide and get back to us.

Hi guys. One more thing to consider that I've run into a few times is a non-working bulb that isn't recognized. This almost always happens in the rear. There can be two or even three bulbs in one rear corner, and they may have two filaments in each one, one for the tail light that still works, and one for the brake / signal that is dead. To check for that, use the hazard flasher so both sides flash at the same time, then they're easy to compare if both sides look the same.