First of all, see whether the wall charger or portable charger works normally, see whether there is a bright red fault light or no power at all. If the wall mount and the car are normal and can not be charged, then it can be basically concluded that the car charger is faulty, the specific performance is:
Plug in the charging gun, the meter is completely unresponsive
The red charging plug on the dashboard is displayed and not displayed
A charging interface can appear, but the charging power is very low or negative, and then connect and disconnect
Any one of the above three faults can basically be judged as the car charger fault. This thing has a long warranty, you can contact the 4s shop to diagnose and replace it free of charge.