Is it illegal to leave as soon as possible after receiving the text message?

It is usually not illegal to leave as soon as possible after receiving a text message.

However, if the owner violates the traffic rules when parking, such as not parking in the designated area, or not leaving the vehicle at the specified time, even if he receives the information of leaving as soon as possible, it is also regarded as illegal parking.

So whether it is illegal to leave the SMS as soon as possible depends on the specific situation.