TESLA Alert
PCS-A089
PCS_a089_hvBusDischargeIrrational
Also written as PCS_A089 / PCS A089 / PCS_a089_hvBusDischargeIrrational / pcs_a089_hvbusdischargeirrational
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-A089 mean?
Tesla alert code in the Power Conversion System (PCS) module. PCS DCDC HV bus is not discharging with specified rate
Original Description
PCS DCDC HV bus is not discharging with specified rate
Affected Tesla Models
Model SModel XModel 3Model Y
What You May Notice
- Power Conversion System alert: PCS DCDC HV bus is not discharging with specified rate
- 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-A089 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.