Watching the video of Titus canyon bring back sweet memories.
We drove that canyon Some years ago in a rental car. At the beginning a sign said ď only for 4 wheel drive carsĒ (ours was a normal car) but we just wanted to see the canyon and ..... we ignored the sign.
Experience from New Zealand learned us that these signs were for people who are really not capable to operate any car and kill themselves once the tarmac is gone. I think my driving is a little bit better (being, years ago, a motorcycle safety instructor) and we started this adventure.
No worries, we came out alive 😇 and had a wonderful experience.
Would we do it again ....... YES YES YES.
When you are out there, ride the canyon and enjoy.