PCS-A084
PCS_a084_vDropFastInParasiticDiodeRegion
Also written as PCS_A084 / PCS A084 / PCS_a084_vDropFastInParasiticDiodeRegion / pcs_a084_vdropfastinparasiticdioderegion
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-A084 mean?
Tesla alert code in the Power Conversion System (PCS) module. PCS detects an dangerous voltage drop on DC link when the voltage is in drive inverter's parasitic diode region PCS does not receive CAN messages from VCFRONT Charger does not receive all expected CAN messages from front vehicle controller Charger recieves all expected CAN messages from front vehicle controller DCDC converter does not regulate LV bus voltage to target, 12V battery may not charge correctly DCDC tank current period is too long, indicating that DCDC FETs are not switching properly Charger DC output current exceeds maximum output current threshold
Original Description
PCS detects an dangerous voltage drop on DC link when the voltage is in drive inverter's parasitic diode region PCS does not receive CAN messages from VCFRONT Charger does not receive all expected CAN messages from front vehicle controller Charger recieves all expected CAN messages from front vehicle controller DCDC converter does not regulate LV bus voltage to target, 12V battery may not charge correctly DCDC tank current period is too long, indicating that DCDC FETs are not switching properly Charger DC output current exceeds maximum output current threshold
Affected Tesla Models
What You May Notice
- Power Conversion System alert: PCS detects an dangerous voltage drop on DC link when the voltage is in drive inverter's parasitic diode region PCS does
- 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-A084 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.