This code means that the evaporative emission control system pressure sensor is detecting a higher than expected pressure in the system. This could be due to a number of reasons, including:
* A faulty pressure sensor
* A leak in the evaporative emission control system
* A malfunctioning fuel tank cap
* A faulty purge valve
To troubleshoot this code, you will need to:
1. Check the pressure sensor for proper operation.
2. Check the evaporative emission control system for leaks.
3. Check the fuel tank cap for proper operation.
4. Check the purge valve for proper operation.
Once you have identified the source of the problem, you will need to repair it in order to clear the code and restore the vehicle to proper operation.