P0A58Drive Motor B Current Sensor Circuit High
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- P0A58 reports that the output of the drive motor B current sensor sits above its valid range, for instance from an open sensor ground, a short to the sensor supply or an internal fault that saturates the output. No manufacturer documents P0A58 publicly. Patents from Toyota and Hyundai show how motor controllers judge their current sensors: against fixed electrical limits, by comparing a control with a monitoring sensor, and by checking the zero-current offset. A reading pinned high would make the controller withdraw torque or trip overcurrent protection although nothing is wrong in the motor. CARB requires out-of-range checks for hybrid input components. P0A57 is the low side, P0A55 the general circuit fault, P0A56 plausibility, P0A54 the motor A equivalent.
- What you may notice
- Hybrid warning and MIL
- Drive motor B disabled, reduced power
- Likely causes
- LikelySensor ground open or high resistance
- PossibleSignal line shorted to the sensor supply
- PossibleCurrent sensor with saturated output
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Workshop only · Usually a job for a workshop.Typical cost: €300 – €4,500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.