The trunk hood may be open because the trunk lock catch or striker on the vehicle is not making proper contact with the latch on the trunk lid. Adjust the trunk lock catch or latch striker if necessary.
Damaged or worn-out trunk shocks or struts.
The trunk shocks or struts may be broken or worn out, causing the trunk hood to open without you wanting it to. Inspect the shocks or struts and replace them if necessary.
Issue with the trunk latch mechanism.
The trunk latch mechanism could be damaged or malfunctioning, causing the handle to not stay fully engaged and thus allowing the hood to open.
Malfunctioning or broken trunk handle.
The handle itself could be broken, or there may be an issue with the mechanism inside that prevents it from staying closed. Take a look at the trunk handle and replace it if necessary.
Issues with electrical wiring or control components.
If you have checked all of the mechanical components and everything seems to be in order, it's possible that there may be an issue with the electrical wiring or control components that manage the trunk latch.
