Most often a single byte, which maps to the following table.
| Value | Meaning |
|---|---|
| 0 | Unknown, possibly related to the garage (exiting?) |
| 1 | Unknown, possibly related to the garage (entering?) |
| 32 | Exited pit lane or pit limiter disengaged |
| 33 | Requested pit |
| 34 | Entered pit lane or pit limiter engaged |
| 35 | Entered pit box or car on jacks |
| 36 | Exited pit box or car off jacks |
If the value is 36, there is an extra 5 bytes of unknown data included. These may refer to fuel taken on, damage fixed, tyres changed.