PCS-A009
PCS_a009_chgPfcCurrentRegulation
Also written as PCS_A009 / PCS A009 / PCS_a009_chgPfcCurrentRegulation / pcs_a009_chgpfccurrentregulation
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-A009 mean?
Tesla alert code in the Power Conversion System (PCS) module. Charger is not able to regulate its input current Charger PFC current regulator error exceeds threshold Charger PFC current regulator error is below clear threshold PCS DCDC has reached its max hardware power capability Charging is inhibited due to low 12V Charger detects 12V bus voltage is below 7V for more than 500ms Charger detects 12V bus voltage is above 7V PCS has detected at least one damaged AC charging phase, AC charging power will be limited Power conversion system detected reset while enabling a phase, and did not attempt to re-enable phase Power conversion system is reset or power cycled Charger detects wall power is removed while charging info from manualPCS_A017 Charger detects wall power was unexpectedly removed while charging Charging faulted due to too large of a voltage drop between starting charge and during charge info from manualPCS_A054 Charger detects greater than 14% input voltage drop after ramping power Inability to AC charge, possibly due to bad wiring external to vehicle PCS is not able to boot CPU2 and AC charging functionality is lost Power conversion system was unable to boot CPU2 Power conversion system boots CPU2 successfully DCDC PWM enable hardline de-asserted while DCDC was commanded to be active DCDC converter detected that enable line was de-asserted unexpectedly
Original Description
Charger is not able to regulate its input current Charger PFC current regulator error exceeds threshold Charger PFC current regulator error is below clear threshold PCS DCDC has reached its max hardware power capability Charging is inhibited due to low 12V Charger detects 12V bus voltage is below 7V for more than 500ms Charger detects 12V bus voltage is above 7V PCS has detected at least one damaged AC charging phase, AC charging power will be limited Power conversion system detected reset while enabling a phase, and did not attempt to re-enable phase Power conversion system is reset or power cycled Charger detects wall power is removed while charging info from manualPCS_A017 Charger detects wall power was unexpectedly removed while charging Charging faulted due to too large of a voltage drop between starting charge and during charge info from manualPCS_A054 Charger detects greater than 14% input voltage drop after ramping power Inability to AC charge, possibly due to bad wiring external to vehicle PCS is not able to boot CPU2 and AC charging functionality is lost Power conversion system was unable to boot CPU2 Power conversion system boots CPU2 successfully DCDC PWM enable hardline de-asserted while DCDC was commanded to be active DCDC converter detected that enable line was de-asserted unexpectedly
Affected Tesla Models
What You May Notice
- Power Conversion System alert: Charger is not able to regulate its input current Charger PFC current regulator error exceeds threshold Charger PFC curr
- 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-A009 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.