IBST-A090
IBST_a090_rotorCosOutOfRangeHigh
What does IBST-A090 mean?
Tesla alert code in the Integrated Brake System (IBST) module. Rotation Position Sensor Cos+ or Cos-signal too high ASW configuration takes too long Linear Position Sensor Channel 1 Line shorted to Supply or Interruption of Sensor ground Assertion failed. ECU internal fault, check wiring to the unit and/or re-flash. If problem continures after several power cycles, reolace unit. Linear Position Sensor Channel 2 Line shorted to ground
Original Description
Rotation Position Sensor Cos+ or Cos-signal too high ASW configuration takes too long Linear Position Sensor Channel 1 Line shorted to Supply or Interruption of Sensor ground Assertion failed. ECU internal fault, check wiring to the unit and/or re-flash. If problem continures after several power cycles, reolace unit. Linear Position Sensor Channel 2 Line shorted to ground
Severity Notes
IBST-A090 is an Alert in the Integrated Brake System system. It is generally safe to continue driving, but have it checked at your next scheduled service.