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P101C 2015 Chevrolet Silverado Code - Glow Plug Control Module Temperature Sensor 2 Circuit High Voltage

Quick Answer

The P101C diagnostic trouble code (DTC) for a 2015 Chevrolet Silverado refers to a Glow Plug Control Module Temperature Sensor 2 Circuit High Voltage. Common causes include Faulty temperature sensor, Wiring issues such as a short or open circuit, Faulty 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 2015 Chevrolet Silverado indicates Glow Plug Control Module Temperature Sensor 2 Circuit High Voltage.
Common causes
Common causes include Faulty temperature sensor, Wiring issues such as a short or open circuit, Faulty 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.
What is this?
Table of contents Created and updated by William Orellana on Sep 16, 2024
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Code P101C 2015 Chevrolet Silverado Description

The P101C diagnostic trouble code (DTC) for a 2015 Chevrolet Silverado refers to a Glow Plug Control Module Temperature Sensor 2 Circuit High Voltage. This code indicates that there is a high voltage condition detected in the temperature sensor circuit of the glow plug control module. The glow plug control module is responsible for controlling the glow plugs in a diesel engine, which are used to heat the combustion chamber during cold starts. The temperature sensor monitors the temperature of the glow plug control module to ensure proper operation.

OBDII Code P101C 2015 Chevrolet Silverado - Glow Plug Control Module Temperature Sensor 2 Circuit High Voltage
P101C 2015 Chevrolet Silverado Code - Glow Plug Control Module Temperature Sensor 2 Circuit High Voltage

Common Causes of P101C 2015 Chevrolet Silverado

  1. Faulty temperature sensor
  2. Wiring issues such as a short or open circuit
  3. Faulty glow plug control module
  4. Corrosion or poor connections in the sensor circuit
  5. Electrical issues such as a blown fuse or relay related to the glow plug control module

Symptoms of P101C 2015 Chevrolet Silverado

  1. Difficulty starting the engine, especially in cold weather
  2. Rough idle or misfiring during startup
  3. Excessive smoke from the exhaust during cold starts
  4. Illumination of the check engine light on the dashboard

How to Fix P101C 2015 Chevrolet Silverado

  1. Begin by conducting a thorough inspection of the temperature sensor, wiring, and glow plug control module to identify any visible damage or issues.
  2. Test the temperature sensor using a multimeter to check for proper resistance values and ensure it is functioning correctly.
  3. Inspect the wiring harness for any signs of damage, corrosion, or poor connections. Repair or replace any damaged wiring as needed.
  4. If the temperature sensor and wiring are in good condition, test the glow plug control module for proper operation. Replace the module if it is found to be faulty.
  5. Clear the DTC with a scan tool after completing the repairs and test the vehicle to ensure the issue has been resolved.

Cost to Fix P101C 2015 Chevrolet Silverado

The typical repair costs for addressing a Glow Plug Control Module Temperature Sensor 2 Circuit High Voltage issue can range from $200 to $500, including parts and labor. However, it's important to note that specific diagnosis time and labor rates at auto repair shops can vary based on factors such as location, vehicle make and model, and engine type. Auto repair shops commonly charge between $80 and $150 per hour for labor, with rates potentially higher at dealerships or metropolitan areas and lower at independent shops. To obtain a more accurate estimate, it is recommended to inquire about local rates before proceeding with the repair.

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P101C 2015 Chevrolet Silverado Code

1. What does the OBDII code P101C mean on a 2015 Chevrolet Silverado?

P101C indicates a problem with the Glow Plug Control Module Temperature Sensor 2 Circuit experiencing high voltage, which could affect engine performance in cold starts.

2. What are the symptoms of code P101C in a 2015 Chevy Silverado?

Symptoms may include difficulty starting in cold weather, reduced engine performance, an illuminated check engine light, or potential glow plug system faults.

3. What causes the P101C code to appear?

Common causes include a faulty temperature sensor, damaged wiring or connections in the circuit, a malfunctioning glow plug control module, or a short to voltage.

4. Can I drive my 2015 Chevy Silverado with a P101C code?

While the truck may still run, it's not recommended to ignore the issue as it can lead to poor cold starting performance and potential long-term damage to the glow plug system.

5. How do I troubleshoot the P101C code?

Start by inspecting the Glow Plug Control Module Temperature Sensor 2 and its wiring for damage, corrosion, or loose connections. Use a multimeter to check for voltage irregularities.

6. Is replacing the temperature sensor the only fix for the P101C code?

Not necessarily. The issue could also stem from wiring issues, poor connections, or a faulty glow plug control module, so a thorough diagnosis is essential.

7. How much does it cost to fix the P101C code on a 2015 Silverado?

Repair costs can vary but may range from $100 to $300 for parts and labor, depending on whether the issue is with the sensor, wiring, or control module.

8. Can a faulty Glow Plug Control Module cause the P101C code?

Yes, a malfunctioning Glow Plug Control Module can result in incorrect voltage readings, triggering the P101C code.

9. Does the P101C code affect emissions?

While primarily related to cold starts, unresolved issues can indirectly affect emissions by impairing engine performance during warm-up cycles.

10. Can a software update fix the P101C code?

In some cases, a software update to the engine control module (ECM) or glow plug control module may resolve voltage calibration issues, but this depends on the specific circumstances.

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