P101C 2016 GMC Sierra Code - Glow Plug Control Module Temperature Sensor 2 Circuit High Voltage
Quick Answer
The P101C diagnostic trouble code (DTC) for a 2016 GMC Sierra relates to the Glow Plug Control Module Temperature Sensor 2 Circuit registering a high voltage. Common causes include Faulty glow plug control module temperature sensor, Wiring or connector issues in the temperature sensor circuit, Overheating of the glow plug control module. 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
- P101C 2016 GMC Sierra indicates Glow Plug Control Module Temperature Sensor 2 Circuit High Voltage.
- Common causes
- Common causes include Faulty glow plug control module temperature sensor, Wiring or connector issues in the temperature sensor circuit, Overheating of the glow plug control module.
- 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.
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Code P101C 2016 GMC Sierra Description
The P101C diagnostic trouble code (DTC) for a 2016 GMC Sierra relates to the Glow Plug Control Module Temperature Sensor 2 Circuit registering a high voltage. The glow plug control module is a crucial component in diesel engines, responsible for heating the glow plugs to aid in cold starting. The temperature sensor monitors the module's temperature to ensure proper functioning. When the sensor detects a high voltage in the circuit, it indicates that the module is operating at a temperature above the specified range, potentially leading to issues with the glow plug system.
Common Causes of P101C 2016 GMC Sierra
- Faulty glow plug control module temperature sensor.
- Wiring or connector issues in the temperature sensor circuit.
- Overheating of the glow plug control module.
- ECM software or hardware issues.
- Environmental factors such as extreme temperatures affecting sensor readings.
Symptoms of P101C 2016 GMC Sierra
- Difficulty starting the engine, especially in cold weather.
- Rough idling or stalling after startup.
- Decreased fuel efficiency.
- Increased emissions.
- Illumination of the check engine light on the dashboard.
How to Fix P101C 2016 GMC Sierra
- Diagnose the issue by using a scan tool to retrieve the DTC and inspecting the glow plug control module temperature sensor and related components.
- Test the temperature sensor's resistance and voltage to determine if it is functioning within specifications.
- Replace the faulty temperature sensor if it is out of range or not providing accurate readings.
- Inspect and repair any damaged wiring or connectors in the circuit.
- Clear the DTC and test the vehicle to ensure the issue has been resolved.
Cost to Fix P101C 2016 GMC Sierra
The typical repair costs for addressing a P101C code on a 2016 GMC Sierra can range from $150 to $400, including parts and labor. However, the specific diagnosis time and labor rates at auto repair shops can vary depending on factors such as location, vehicle make and model, and engine type. It's recommended to check with local shops for a more accurate estimate. Keep in mind that rates in metropolitan areas or at dealerships may be higher, while independent shops often offer more competitive pricing.
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Frequently Asked Questions about P101C 2016 GMC Sierra Code
What does the OBDII code P101C mean on a 2016 GMC Sierra?
The code P101C indicates a high voltage issue in the Glow Plug Control Module Temperature Sensor 2 Circuit, which monitors temperature for proper engine operation.
What are the common symptoms of the P101C code?
Symptoms may include an illuminated check engine light, hard starting in cold weather, reduced engine performance, or rough idling.
What causes the P101C code to appear?
Possible causes include a faulty temperature sensor, damaged wiring or connectors in the circuit, a malfunctioning glow plug control module, or corrosion in electrical connections.
Can I drive my GMC Sierra with the P101C code?
While the truck may still be drivable, ignoring the code can lead to reduced engine performance or further damage over time, especially in cold weather conditions.
How do you diagnose the P101C code?
Diagnosis involves using an OBDII scanner to confirm the code, inspecting the wiring and connectors for damage or corrosion, and testing the temperature sensor and glow plug control module for proper operation.
How do you fix the P101C code?
Repairs may include replacing the faulty temperature sensor, repairing or replacing damaged wiring or connectors, or replacing the glow plug control module if necessary.
What is the Glow Plug Control Module Temperature Sensor 2?
This sensor monitors engine temperature to help the glow plug system operate effectively during cold starts and optimize engine performance.
Can a loose connection trigger the P101C code?
Yes, loose or corroded connections in the sensor circuit can cause high voltage readings and trigger the code.
Is the P101C code related to cold weather performance?
Yes, the glow plug system, including Temperature Sensor 2, is critical for starting and running the engine efficiently in cold weather.
How much does it cost to fix the P101C code?
Repair costs vary but typically range from $100 to $300, depending on whether the issue is with the sensor, wiring, or control module.
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