This procedure involves replacing the hardware-integrated sensor assembly to resolve the CP_a043 fault. Due to the high-voltage nature of the vehicle charging system, it is recommended that this repair be performed by an authorized Tesla Service technician.
Safety Precautions
- Ensure the vehicle is powered down and disconnected from any charging equipment.
- Wear appropriate personal protective equipment (PPE) as required for automotive electrical service.
Steps to Replace
- Schedule a service appointment through the Tesla mobile app to have the charge port door sensor assembly replaced.
- The technician will remove the exterior charge port trim and access the internal sensor housing.
- The failed sensor assembly will be disconnected from the vehicle harness and removed.
- A new, verified sensor assembly will be installed and connected to the harness.
- The technician will perform a software handshake/re-calibration to ensure the vehicle recognizes the new sensor and the door's state.
Verification
- Once the repair is complete, attempt to open and close the charge port door.
- Monitor the vehicle's center screen or instrument cluster to ensure the door state is accurately reported.
- Verify that the CP_a043 error code is cleared from the vehicle's alert system.
Sources
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