AutoCodes – Chevrolet – P101B 2015 Chevrolet Silverado

P101B 2015 Chevrolet Silverado Code - Glow Plug Control Module Temperature Sensor 2 Circuit Low 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: P101B 2015 Chevrolet Silverado indicates Glow Plug Control Module Temperature Sensor 2 Circuit Low 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 297

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 P101B 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 P101B 2015 Chevrolet Silverado - Glow Plug Control Module Temperature Sensor 2 Circuit Low Voltage - AutoCodes.com — P101B 2015 Chevrolet Silverado Code - Glow Plug Control Module Temperature Sensor 2 Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P101B 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 P101B 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 P101B 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 P101B 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 P101B 2015 Chevrolet Silverado Code

1. What does the OBDII code P101B mean on a 2015 Chevrolet Silverado?

The P101B code indicates a "Glow Plug Control Module Temperature Sensor 2 Circuit Low Voltage," meaning the sensor is detecting a voltage below the expected range.

2. What are the symptoms of the P101B code in a Chevy Silverado?

Common symptoms include difficulty starting in cold weather, reduced engine performance, a check engine light, and possible engine misfires.

3. What causes the P101B code to appear?

Possible causes include a faulty glow plug control module, damaged wiring or connectors in the temperature sensor circuit, or a failed temperature sensor 2.

4. Can I drive my 2015 Silverado with the P101B code?

Itâ€™s not recommended to drive for extended periods with this code, as it may lead to poor cold-weather starting and reduced engine efficiency.

5. How is the P101B code diagnosed?

A mechanic will inspect the wiring and connectors, test the glow plug control module temperature sensor 2, and check for proper voltage signals using a diagnostic scanner.

6. What repairs can fix the P101B code?

Repairs may include replacing the temperature sensor 2, repairing damaged wiring or connectors, or replacing the glow plug control module if it is faulty.

7. How much does it cost to fix a P101B code on a 2015 Silverado?

The repair cost can range from $100 to $500, depending on whether the issue is with the sensor, wiring, or the glow plug control module.

8. Can a loose or corroded connection cause the P101B code?

Yes, loose, corroded, or damaged connectors in the temperature sensor circuit can cause low voltage and trigger the P101B code.

9. How do I prevent the P101B code from recurring?

Regularly inspect the glow plug system, ensure the wiring and connectors are intact, and address any issues with the glow plug control module promptly.

10. Does the P101B code affect fuel efficiency?

Yes, this code can indirectly affect fuel efficiency by causing poor engine performance and suboptimal combustion, especially in cold weather conditions.