AutoCodes – Chevrolet – P101B 2018 Chevrolet Silverado

P101B 2018 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 2018 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 364

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 2018 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 2018 Chevrolet Silverado - Glow Plug Control Module Temperature Sensor 2 Circuit Low Voltage - AutoCodes.com — P101B 2018 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 2018 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 2018 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 2018 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 2018 Chevrolet Silverado code?

Need more information on how to fix the P101B 2018 Chevrolet Silverado code? Get Access to Factory Service Manuals

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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 2018 Chevrolet Silverado Code

1. What are common symptoms of an OBDII code P101B in a 2018 Chevrolet Silverado?

- Common symptoms include rough idling, reduced engine performance, and possible illumination of the check engine light.

2. What does the OBDII code P101B indicate in a 2018 Chevrolet Silverado?

- The code P101B indicates an issue with the Glow Plug Control Module Temperature Sensor 2 Circuit showing low voltage.

3. What are possible causes of the Glow Plug Control Module Temperature Sensor 2 Circuit low voltage issue in a 2018 Chevrolet Silverado?

- Possible causes include a faulty temperature sensor, damaged wiring or connectors, a malfunctioning glow plug control module, or issues with the vehicle's electrical system.

4. How can I diagnose the OBDII code P101B in my 2018 Chevrolet Silverado?

- Diagnosing the code may involve using a scan tool to retrieve the specific trouble code, checking the glow plug control module temperature sensor for proper operation, and inspecting related wiring for any damage or loose connections.

5. Can I continue driving my 2018 Chevrolet Silverado with an unresolved P101B code?

- It is not recommended to continue driving with an unresolved P101B code as it can lead to poor engine performance and potential damage to other components.

6. How can I repair the Glow Plug Control Module Temperature Sensor 2 Circuit low voltage issue in my 2018 Chevrolet Silverado?

- Repairing the issue may involve replacing the faulty temperature sensor, repairing damaged wiring or connectors, replacing the glow plug control module, or addressing any other underlying electrical problems.

7. Is it safe to clear the OBDII code P101B in my 2018 Chevrolet Silverado without fixing the issue?

- Clearing the code without fixing the underlying issue is not recommended, as the problem may persist and could potentially worsen over time.

8. Can extreme weather conditions affect the performance of the Glow Plug Control Module Temperature Sensor in a 2018 Chevrolet Silverado?

- Yes, extreme temperatures can impact the performance of the sensor, leading to potential issues with voltage readings and overall functionality.

9. How often should the Glow Plug Control Module Temperature Sensor be inspected in a 2018 Chevrolet Silverado?

- It is recommended to include the sensor in routine vehicle maintenance checks or whenever related symptoms are noticed to ensure early detection of any issues.

10. Does the repair of the Glow Plug Control Module Temperature Sensor issue require specialized tools or expertise for a 2018 Chevrolet Silverado?

- Depending on the exact cause of the problem, repairing the issue may require basic automotive tools and knowledge or may necessitate professional assistance, especially for complex electrical diagnostics.