P0C5C 2018 GMC Sierra Code - Drive Motor Position Sensor Circuit 2 Low Voltage
Quick Answer
The generator control module also called the starter/generator control module, is comprised of the following three control modules: the hybrid/EV powertrain control module 1, 14 V power module, and the drive motor control module. Common causes include Faulty Starter/Generator, Starter/Generator harness is open or shorted, Starter/Generator circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- P0C5C 2018 GMC Sierra indicates Drive Motor Position Sensor Circuit 2 Low Voltage.
- Common causes
- Common causes include Faulty Starter/Generator, Starter/Generator harness is open or shorted, Starter/Generator circuit poor electrical connection.
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
Code P0C5C 2018 GMC Sierra Description
The generator control module monitors the angular position, speed, and direction of the starter generator rotor based upon the signals of the resolver-type motor position sensor. The position sensor contains a drive coil, two driven coils, and an irregular-shaped metallic rotor. The metallic rotor is mechanically attached to the shaft of the starter generator.
At ignition ON, an AC voltage, 10 kHz excitation signal is output to the drive coil. The drive coil excitation signal creates a magnetic field surrounding the two driven coils and the irregular-shaped rotor. The generator control module then monitors the two driven coil circuits for a return signal. The position of the irregular metallic rotor causes the magnetically induced return signals of the driven coils to vary in size and shape. A comparison of the two driven coils signals allows the generator control module to determine the exact position, speed, and direction of the starter generator rotor. The position sensor is a non-serviceable part of the starter generator.
The Diagnostic Trouble Code (DTC) will be set when the Drive Motor Position Sensor Circuit 2 reference voltage is less than 0.1 V.
What are the Possible Causes of the DTC P0C5C 2018 GMC Sierra?
- Faulty Starter/Generator
- Starter/Generator harness is open or shorted
- Starter/Generator circuit poor electrical connection
- Faulty Starter/Generator Control Module
How to Fix the DTC P0C5C 2018 GMC Sierra?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P0C5C 2018 GMC Sierra code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
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Frequently Asked Questions about P0C5C 2018 GMC Sierra Code
1. What does the OBDII code P0C5C mean on a 2018 GMC Sierra?
The code P0C5C indicates a "Drive Motor Position Sensor Circuit 2 Low Voltage," which means the vehicle's control module has detected a low voltage issue in the second circuit of the drive motor position sensor.
2. What are the symptoms of code P0C5C in a 2018 GMC Sierra?
Common symptoms include reduced power, illumination of the check engine light, difficulty shifting, and possible drivability issues like hesitation or jerking.
3. What causes the P0C5C code in a 2018 GMC Sierra?
Causes may include a faulty drive motor position sensor, damaged wiring or connectors in the sensor circuit, a malfunctioning control module, or low voltage from the battery or powertrain system.
4. Can I drive my 2018 GMC Sierra with the P0C5C code active?
It is not recommended to drive with this code active, as it may lead to reduced performance and further damage to the drive motor or associated components.
5. How do I diagnose the P0C5C code on a 2018 GMC Sierra?
Diagnosis involves using a scan tool to confirm the code, inspecting the drive motor position sensor and its wiring for damage, and testing the voltage in the circuit to identify potential faults.
6. How is the P0C5C code fixed on a 2018 GMC Sierra?
Repairs may include replacing the drive motor position sensor, repairing or replacing damaged wiring or connectors, or reprogramming or replacing the control module if necessary.
7. Is the drive motor position sensor expensive to replace on a 2018 GMC Sierra?
The cost of replacing the drive motor position sensor varies, but it can range from $200 to $500, including parts and labor, depending on the repair facility and location.
8. Could a low battery cause the P0C5C code in a 2018 GMC Sierra?
Yes, a low or failing battery can contribute to the P0C5C code by causing insufficient voltage in the drive motor position sensor circuit.
9. Does the P0C5C code require reprogramming the control module?
In some cases, reprogramming the control module may be necessary if the fault lies within the module's software or if a new module is installed.
10. How can I prevent the P0C5C code from recurring on my 2018 GMC Sierra?
Regular maintenance, including checking the battery and electrical connections, ensuring proper voltage levels, and promptly addressing any sensor issues, can help prevent recurrence of this code.
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