EPAS3P-A120
EPAS3P_a120_pvtEcuStatCntError
What does EPAS3P-A120 mean?
Tesla alert code in the Electric Power Steering Primary (EPAS3P) module. The electric power assist steering (EPAS) internal private bus is receiving an unexpected status counter value, resulting in the chassis bus electric power assist steering (EPAS3S) Electronic Control Unit (ECU) to lose functionality. The status counter does not increment as expected. The status counter increments as expected. The power steering function is operational, but steering assist will likely be reduced. A customer facing alert describing a reduced level of assist for power steering may be present. Autopilot may be disabled in some cases. DAS_steeringControl message not received DAS_steeringControl message not received by EPAS EPAS receives DAS_steeringControl message again Target torque correlation error Invalid RCM_yawRateQF value received Invalid DAS_steeringControlCounter value received DAS_steeringControlCounter is not incrementing correctly EPAS observes DAS_steeringControlCounter incrementing correctly Torque sensor zero point not calibrated Invalid motor cogging compensation values Cogging torque service is not performed or incorrect value is stored Invalid SCCM_steeringAngleSensorCrc value received Unexpected SCCM_steeringAngleSensorCrc value received by EPAS EPAS receives expected SCCM_steeringAngleSensorCrc value
Original Description
The electric power assist steering (EPAS) internal private bus is receiving an unexpected status counter value, resulting in the chassis bus electric power assist steering (EPAS3S) Electronic Control Unit (ECU) to lose functionality. The status counter does not increment as expected. The status counter increments as expected. The power steering function is operational, but steering assist will likely be reduced. A customer facing alert describing a reduced level of assist for power steering may be present. Autopilot may be disabled in some cases. DAS_steeringControl message not received DAS_steeringControl message not received by EPAS EPAS receives DAS_steeringControl message again Target torque correlation error Invalid RCM_yawRateQF value received Invalid DAS_steeringControlCounter value received DAS_steeringControlCounter is not incrementing correctly EPAS observes DAS_steeringControlCounter incrementing correctly Torque sensor zero point not calibrated Invalid motor cogging compensation values Cogging torque service is not performed or incorrect value is stored Invalid SCCM_steeringAngleSensorCrc value received Unexpected SCCM_steeringAngleSensorCrc value received by EPAS EPAS receives expected SCCM_steeringAngleSensorCrc value
Severity Notes
EPAS3P-A120 is an Alert in the Electric Power Steering Primary system. It is generally safe to continue driving, but have it checked at your next scheduled service.