PCS-A099
PCS_a099_microGridOverLoadedSilent
Also written as PCS_A099 / PCS A099 / PCS_a099_microGridOverLoadedSilent / pcs_a099_microgridoverloadedsilent
Why does the exact Tesla alert ID matter?
Record the exact alert ID, including underscores, suffixes, and companion alerts. Tesla alerts that look similar can point to different modules, timestamps, and service procedures.
What does PCS-A099 mean?
Tesla alert code in the Power Conversion System (PCS) module. PCS detects the grid frequency droops significantly, indicating the grid is over loaded PCS does not receive CAN messages from CP Charger does not receive all expected CAN messages from charge port Charger recieves all expected CAN messages from charge port PCS detects its sigma delta module has malfunctioned DCDC sigma delta module detects clock fault
Original Description
PCS detects the grid frequency droops significantly, indicating the grid is over loaded PCS does not receive CAN messages from CP Charger does not receive all expected CAN messages from charge port Charger recieves all expected CAN messages from charge port PCS detects its sigma delta module has malfunctioned DCDC sigma delta module detects clock fault
Affected Tesla Models
What You May Notice
- Power Conversion System alert: PCS detects the grid frequency droops significantly, indicating the grid is over loaded PCS does not receive CAN message
- DC-DC converter issue may affect 12V system (lights, accessories)
- Alert shown in the Tesla app
How to Diagnose and Resolve
- 1 Reboot the vehicle
- 2 Check if 12V accessories (lights, door handles) are behaving normally
- 3 Schedule a Tesla Service appointment for PCS inspection
Severity Notes
PCS-A099 is an Alert in the Power Conversion System system. Confirm the vehicle screen and Tesla app show no driving or charging restrictions, and schedule service if the alert returns.