What Does P0C58 Mean?
This code is set when the position sensor circuit "A" on drive motor "B" produces a voltage signal above the maximum threshold recognized by the powertrain controller. This typically indicates a short to voltage supply, a pulled-up open circuit, or internal sensor failure producing an abnormally high output. The inverter will be unable to accurately determine rotor angle, degrading or disabling motor B operation.
Safety Warning
An erroneously high position signal can cause severe motor commutation errors, potentially resulting in sudden torque spikes or loss of drive. The vehicle will typically enter protective shutdown. Immediate repair is required before driving.
Common Causes
33%
Short to battery voltage or sensor supply voltage in the signal wiring
25%
Open circuit in the ground return path of the sensor, causing signal pull-up
20%
Internal sensor failure producing excessive output voltage
14%
Connector pin damage creating cross-talk between supply and signal pins
8%
Inverter controller input circuit fault (internal pull-up failure)
Diagnostic Steps
1
Inspect the sensor connector for bent pins that could short the signal line to the supply voltage line.
2
Measure the sensor signal voltage with the key on—compare against the manufacturer's specified maximum threshold.
3
Verify the sensor ground circuit has continuity and low resistance back to the controller ground.
4
Disconnect the sensor and check if the controller still reads high—if so, the issue is in the wiring or controller, not the sensor.
5
Test for short circuits between the signal wire and the supply voltage wire along the entire harness routing.
Estimated Repair Cost
$300 - $1,800
Parts + labor, varies by vehicle and location
This code is set when the position sensor circuit "A" on drive motor "B" produces a voltage signal above the maximum threshold recognized by the powertrain controller. This typically indicates a short to voltage supply, a pulled-up open circuit, or internal sensor failure producing an abnormally hig...
The most common cause of P0C58 (Drive Motor "B" Position Sensor Circuit "A" High) is: Short to battery voltage or sensor supply voltage in the signal wiring
Typical repair costs for P0C58 range from $300 to $1,800, depending on the vehicle, location, and whether you do it yourself or go to a shop.
An erroneously high position signal can cause severe motor commutation errors, potentially resulting in sudden torque spikes or loss of drive. The vehicle will typically enter protective shutdown. Immediate repair is required before driving.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P0C58 to identify the root cause.
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Quick Info
Category
Powertrain
System
Hybrid/EV Drive Motor System
Difficulty
Type
Generic (SAE)
Recommended Tools
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