What Does P0C5D Mean?
This code is set when the powertrain controller detects that the signal voltage from drive motor "A" position sensor circuit "B" exceeds the programmed maximum threshold. This typically results from a short to supply voltage, a lost ground reference, or an internal sensor failure producing excessive output. The inverter cannot safely operate motor A without valid position data from both channels.
Safety Warning
An erroneously high position signal on the primary drive motor can cause catastrophic commutation errors. The system will typically shut down motor A to prevent damage. Loss of primary drive power at speed is a significant safety concern.
Common Causes
33%
Short to battery or sensor supply voltage in the circuit B signal wiring
25%
Open ground return path causing the signal to float high
20%
Internal sensor failure producing an over-range output on circuit B
14%
Cross-contamination between supply and signal pins at the connector
8%
Controller input circuit fault pulling the circuit B reading high
Diagnostic Steps
1
Measure the circuit B signal voltage at the controller connector with the key on—verify it exceeds the specified maximum.
2
Disconnect the sensor and recheck the voltage at the controller—if still high, the fault is in the harness or controller, not the sensor.
3
Verify the ground return wire has continuity and low resistance from the sensor connector back to the controller ground pin.
4
Inspect connector pins for damage or contamination that could bridge the supply and signal circuits.
5
If the sensor and wiring are sound, perform controller diagnostics per the manufacturer's procedure to rule out an internal fault.
Estimated Repair Cost
$300 - $1,800
Parts + labor, varies by vehicle and location
This code is set when the powertrain controller detects that the signal voltage from drive motor "A" position sensor circuit "B" exceeds the programmed maximum threshold. This typically results from a short to supply voltage, a lost ground reference, or an internal sensor failure producing excessive...
The most common cause of P0C5D (Drive Motor "A" Position Sensor Circuit "B" High) is: Short to battery or sensor supply voltage in the circuit B signal wiring
Typical repair costs for P0C5D 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 on the primary drive motor can cause catastrophic commutation errors. The system will typically shut down motor A to prevent damage. Loss of primary drive power at speed is a significant safety concern.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P0C5D to identify the root cause.
OBDHut Mobile App
Scan codes directly from your car with the OBDHut app.
Coming Soon
Quick Info
Category
Powertrain
System
Hybrid/EV Drive Motor System
Difficulty
Type
Generic (SAE)
Recommended Tools
OBD2 Scanner
A quality scan tool helps you read codes, view live data, and clear faults.
