C058DBrake Booster Motor B Position Sensor Circuit High
- Generic OBD-II code · Chassis
- Can trigger limp mode
- How the car detects it
- C058D is set when a signal of motor B's position sensor exceeds its upper limit, for example because a sensor line touches supply voltage or the sensor ground has opened. No manufacturer documents C058D publicly; the range/performance case of the same sensor is C058E, which Stellantis lists for the Jeep Wagoneer eBooster. A short to battery in a resolver path pushes the evaluated signal to its ceiling, as Hitachi's patent explains. Bosch's booster patent outlines what a controller can still do when rotor position feedback is lost: drive the motor open-loop with capped speed and limited speed changes. Depending on the design, the module therefore continues with motor A, runs a degraded mode or switches assist off entirely.
- What you may notice
- Brake system warning and message
- Assist weaker or switched off depending on design
- Likely causes
- LikelySignal line of sensor B shorted to supply or battery voltage
- PossibleOpen ground of sensor B lifting the signal
- RareInternal fault of sensor B in the booster
- Repair
- Hard · Usually a job for a workshop.Typical cost: €100 – €2,800
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.