PCS-A106
PCS_a106_clockSourceNotFromExternalCrystal
Also written as PCS_A106 / PCS A106 / PCS_a106_clockSourceNotFromExternalCrystal / pcs_a106_clocksourcenotfromexternalcrystal
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-A106 mean?
Tesla alert code in the Power Conversion System (PCS) module. PCS bootloader configured the clock source to use the internal clock (INTOSC2), because the DSP has reported a missing clock from the external crystal oscillator On boot, PCS is not using the external crystal oscillator (XTALOSC) No clear condition during operation. The set condition is evaluated on boot, and will remain set until power cycled or reset. Internal oscillator is less precise, potentially has system behavior impact Charger detects unknown grid configuration Charger state machine clears faults Inability to AC charge, possibly due to incompatible grid
Original Description
PCS bootloader configured the clock source to use the internal clock (INTOSC2), because the DSP has reported a missing clock from the external crystal oscillator On boot, PCS is not using the external crystal oscillator (XTALOSC) No clear condition during operation. The set condition is evaluated on boot, and will remain set until power cycled or reset. Internal oscillator is less precise, potentially has system behavior impact Charger detects unknown grid configuration Charger state machine clears faults Inability to AC charge, possibly due to incompatible grid
Affected Tesla Models
What You May Notice
- Power Conversion System alert: PCS bootloader configured the clock source to use the internal clock (INTOSC2), because the DSP has reported a missing c
- 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-A106 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.