AutoCodes – Chevrolet – P101B Chevrolet

P101B Chevrolet 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 Chevrolet 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 831

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

What does this mean?

What are the Possible Causes of the DTC P101B Chevrolet?

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 Chevrolet?

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 Chevrolet 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 Chevrolet code?

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

Need Help with the Code?

Get the P101B Chevrolet code diagnosed by a professional: Find a repair shop in your area

Information for Specific Chevrolet Models

P101B 2014 Chevrolet Silverado — Glow Plug Control Module Temperature Sensor 2 Circuit Low Voltage
P101B 2015 Chevrolet Silverado — Glow Plug Control Module Temperature Sensor 2 Circuit Low Voltage
P101B 2016 Chevrolet Silverado — Glow Plug Control Module Temperature Sensor 2 Circuit Low Voltage
P101B 2017 Chevrolet Silverado — Glow Plug Control Module Temperature Sensor 2 Circuit Low Voltage
P101B 2018 Chevrolet Silverado — Glow Plug Control Module Temperature Sensor 2 Circuit Low Voltage

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 Chevrolet Code

1. What are the common symptoms of OBDII code P101B in a Chevrolet related to the Glow Plug Control Module Temperature Sensor 2 Circuit Low Voltage?

- Common symptoms may include hard starting, rough idling, decreased engine performance, and the illumination of the check engine light.

2. What are the possible causes of OBDII code P101B in a Chevrolet indicating an issue with the Glow Plug Control Module Temperature Sensor 2 Circuit Low Voltage?

- Potential causes could be a faulty glow plug control module, a malfunctioning temperature sensor, wiring issues, or a poor electrical connection.

3. How can I diagnose the root cause of OBDII code P101B in a Chevrolet concerning the Glow Plug Control Module Temperature Sensor 2 Circuit Low Voltage?

- Diagnosis may involve using a scan tool to retrieve the specific code, checking the glow plug control module and temperature sensor for proper functioning, and inspecting the wiring and connections for any damage.

4. Is it safe to continue driving my Chevrolet with OBDII code P101B related to the Glow Plug Control Module Temperature Sensor 2 Circuit Low Voltage?

- It is not recommended to drive the vehicle extensively with this code present, as it can lead to potential engine performance issues and further damage if left unresolved.

5. How can I clear OBDII code P101B in a Chevrolet associated with the Glow Plug Control Module Temperature Sensor 2 Circuit Low Voltage?

- Clearing the code can be done using a scan tool or by disconnecting the car battery for a few minutes. However, the underlying issue causing the code should be addressed to prevent it from reoccurring.

6. Can I repair OBDII code P101B in a Chevrolet myself, or should I seek professional help for the Glow Plug Control Module Temperature Sensor 2 Circuit Low Voltage?

- While some DIY enthusiasts may be able to address the issue themselves by replacing components like the glow plug control module or temperature sensor, it is recommended to consult a professional mechanic for an accurate diagnosis and repair.

7. Are there any specific maintenance tips to prevent OBDII code P101B related to the Glow Plug Control Module Temperature Sensor 2 Circuit Low Voltage in a Chevrolet?

- Regularly inspecting and maintaining the glow plug system, including the control module and temperature sensor, can help prevent issues that may trigger this code.

8. How much does it typically cost to repair OBDII code P101B in a Chevrolet associated with the Glow Plug Control Module Temperature Sensor 2 Circuit Low Voltage?

- The cost of repair can vary depending on the specific cause of the issue, but it may involve replacing the glow plug control module, temperature sensor, or addressing wiring problems. Costs can range from a few hundred to over a thousand dollars.

9. Can extreme weather conditions impact the occurrence of OBDII code P101B in a Chevrolet due to the Glow Plug Control Module Temperature Sensor 2 Circuit Low Voltage?

- Yes, extreme cold or hot temperatures can potentially affect the performance of the glow plug system and temperature sensor, leading to issues that trigger this OBDII code.

10. Is it necessary to replace both the Glow Plug Control Module and Temperature Sensor if OBDII code P101B appears in a Chevrolet?

- Not necessarily. It is advisable to diagnose the specific issue causing the code before replacing components to ensure an accurate and cost-effective repair.