AutoCodes – Chevrolet – P101C 2015 Chevrolet Silverado

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

Quick Answer

The Glow Plug Control Module (GPCM) has the ability to perform internal diagnostics for the temperature sensor circuit. Common causes include Faulty Glow Plug Control Module (GPCM), Glow Plug Control Module harness is open or shorted, Glow Plug Control Module 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: P101C 2015 Chevrolet Silverado indicates Glow Plug Control Module Temperature Sensor 2 Circuit High Voltage.
Common causes: Common causes include Faulty Glow Plug Control Module (GPCM), Glow Plug Control Module harness is open or shorted, Glow Plug Control Module 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.

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Code Popularity 264

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

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Table of contents Created and updated by William Orellana on Oct 01, 2022

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P101C 2015 Chevrolet Silverado Description

The Glow Plug Control Module (GPCM) has the ability to perform internal diagnostics for the temperature sensor circuit. The GPCM monitors the internal temperature sensor voltage and if the voltage is less than 0.21 V or greater than 4.94 V. The GPCM will send a message to the Engine Control Module (ECM) to set the appropriate Diagnostic Trouble Code (DTC). A DTC is detected when one of the GPCM temperature sensors voltage falls outside the calibrated threshold for greater than 1.3 s.

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

What does this mean?

What are the Possible Causes of the DTC P101C 2015 Chevrolet Silverado?

Faulty Glow Plug Control Module (GPCM)
Glow Plug Control Module harness is open or shorted
Glow Plug Control Module circuit poor electrical connection

How to Fix the DTC P101C 2015 Chevrolet Silverado?

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 P101C 2015 Chevrolet Silverado 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.

Need more information about the P101C 2015 Chevrolet Silverado code?

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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.