P101C 2014 GMC Sierra Code - Glow Plug Control Module Temperature Sensor 2 Circuit High Voltage
Quick Answer
The P101C diagnostic trouble code (DTC) for a 2014 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, Damaged or corroded wiring connected to the sensor, Malfunctioning engine control module (ECM). 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 2014 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, Damaged or corroded wiring connected to the sensor, Malfunctioning engine control module (ECM).
- 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 2014 GMC Sierra Description
The P101C diagnostic trouble code (DTC) for a 2014 GMC Sierra relates to the Glow Plug Control Module Temperature Sensor 2 Circuit registering a high voltage. This sensor is responsible for monitoring the temperature of the glow plug control module, which is crucial for the proper functioning of the glow plugs in a diesel engine. When the sensor detects a high voltage in the circuit, it indicates that there may be an issue with the temperature sensor itself or the wiring connected to it.
Common Causes of P101C 2014 GMC Sierra
- Faulty glow plug control module temperature sensor.
- Damaged or corroded wiring connected to the sensor.
- Malfunctioning engine control module (ECM).
- Extreme temperature fluctuations affecting sensor readings.
- Water or debris intrusion causing sensor malfunction.
Symptoms of P101C 2014 GMC Sierra
- Difficulty starting the engine, especially in cold weather.
- Reduced fuel efficiency.
- Illumination of the check engine light.
- Rough idling or misfiring.
- Increased emissions.
How to Fix P101C 2014 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 wiring.
- Replace the faulty temperature sensor if it is determined to be the cause of the high voltage reading.
- Repair or replace any damaged wiring connected to the sensor.
- Check and potentially replace the engine control module (ECM) if necessary.
- Clear the DTC from the ECM memory and test the vehicle to ensure the issue has been resolved.
Cost to Fix P101C 2014 GMC Sierra
The typical repair costs for addressing a P101C code on a 2014 GMC Sierra can vary depending on the specific cause of the issue. Generally, replacing a faulty glow plug control module temperature sensor can range from $100 to $200, including parts and labor. However, if additional components such as wiring or the ECM need to be replaced, the total repair cost could increase significantly.
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Frequently Asked Questions about P101C 2014 GMC Sierra Code
1. What does the OBDII code P101C mean on a 2014 GMC Sierra?
P101C indicates a "Glow Plug Control Module Temperature Sensor 2 Circuit High Voltage" issue, meaning the voltage in the circuit is higher than expected.
2. What are the symptoms of code P101C in a 2014 GMC Sierra?
Common symptoms include difficulty starting the engine, reduced engine performance, and an illuminated check engine light.
3. What causes the P101C code to appear?
This code can be triggered by a faulty temperature sensor, damaged wiring, loose connections, or a malfunctioning glow plug control module.
4. Can driving with code P101C damage my 2014 GMC Sierra?
While it may not immediately damage the vehicle, prolonged driving with this issue can lead to harder starting in cold weather and potential damage to the glow plug system.
5. How do I fix the P101C code on my GMC Sierra?
Repairs may include replacing the faulty temperature sensor, inspecting and repairing damaged wiring, or replacing the glow plug control module if necessary.
6. How do I diagnose the P101C code?
Diagnosis involves using a scan tool to confirm the code, visually inspecting the wiring for damage, testing the temperature sensor, and checking the voltage at the glow plug control module.
7. How much does it cost to repair the P101C code?
Repair costs vary but typically range from $100 to $300 for parts and labor, depending on whether the temperature sensor or control module needs replacement.
8. Can a faulty glow plug cause the P101C code?
No, a faulty glow plug itself typically won’t cause this code. It specifically relates to the temperature sensor circuit in the glow plug control system.
9. Is the P101C code specific to diesel engines?
Yes, this code is specific to diesel engines, as they use glow plugs and a control module to aid in starting and operation.
10. Can I reset the P101C code without fixing the problem?
You can clear the code with a scan tool, but it will likely return if the underlying issue isn’t resolved.
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