EPAS3P-A121
EPAS3P_a121_pvtEcuStatCrcError
Also written as EPAS3P_A121 / EPAS3P A121 / EPAS3P_a121_pvtEcuStatCrcError / epas3p_a121_pvtecustatcrcerror
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 EPAS3P-A121 mean?
Tesla alert code in the Electric Power Steering Primary (EPAS3P) module. Invalid EPAS3P/S_statusCrc value received on internal private bus Unexpected EPAS3P/S_statusCrc value received on internal private bus Expected EPAS3P/S_statusCrc value received on internal private bus Invalid ESP_wheelSpeedsQF value received
Original Description
Invalid EPAS3P/S_statusCrc value received on internal private bus Unexpected EPAS3P/S_statusCrc value received on internal private bus Expected EPAS3P/S_statusCrc value received on internal private bus Invalid ESP_wheelSpeedsQF value received
Affected Tesla Models
What You May Notice
- Electric Power Steering Primary alert: Invalid EPAS3P/S_statusCrc value received on internal private bus Unexpected EPAS3P/S_statusCrc value received on intern
- Steering is functional but may feel slightly different
How to Diagnose and Resolve
- 1 Reboot the vehicle
- 2 Check for OTA software updates
- 3 Schedule service if the steering feels abnormal
Severity Notes
EPAS3P-A121 is an Alert in the Electric Power Steering Primary system. Confirm the vehicle screen and Tesla app show no driving or charging restrictions, and schedule service if the alert returns.