Sullivan was driving a purple McClaren at more than 71mph on the single-carriageway A30, which has a 40mph speed limit, when it crashed with another vehicle, the court heard.
He has amassed more than a million followers across all social media platforms.
His content often shows his lavish lifestyle, with him on nights out with young revellers.
Witnesses to the crash said Sullivan was “in a supercar going extremely fast”, with one stating that he was travelling “at least 100mph or more” before the collision.
Sullivan was extradited from Spain to the UK after being arrested on unrelated matters, the court was told.
A fresh hearing will take place in January next year to decide how much Sullivan must pay to Surrey Police and the Crown Prosecution Service for the additional costs involved in pursuing him abroad.
The prosecution has applied for £18,049.47 to be paid to Surrey Police for a chartered flight to bring Sullivan back to the UK.
Sullivan was set to appear in a Louis Theroux documentary for Netflix exploring the impact of online misogyny on young boys.
