When you find that the parking regeneration function of the DPF (diesel particulate filter) does not start as expected, you can refer to the following suggestions for operation:

Firstly, please ensure that your vehicle has been parked in a flat and unobstructed area, and completely turned off to ensure the safety of the operation process.

Next, you need to give the engine at least 30 minutes of cooling time. This is because attempting DPF regeneration at high temperatures may pose a risk of engine overheating.

If your vehicle is equipped with an automatic start stop system, to avoid interfering with the regeneration process, please disable it by turning off the engine or operating the relevant switch before starting.

Subsequently, locate the DPF regeneration button and attempt to start it. This button may be located on the dashboard, center console, or near the driver's side door, and is typically marked with a triangular symbol containing an exclamation mark.

If the button does not respond, you may consider using an OBD-II scanner or specialized automotive diagnostic software to manually activate DPF regeneration. During this process, it is necessary to connect the OBD-II scanner to the vehicle's diagnostic port and follow the equipment manufacturer's operating instructions.

If the above attempts fail to solve the problem, it is recommended that you seek the help of professional technicians to check for any faults in the DPF itself or other issues that affect the regeneration function.