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P101B Chevrolet Code - Glow Plug Control Module Temperature Sensor 2 Circuit Low Voltage

Quick Answer

The P101B diagnostic trouble code for Chevrolet vehicles refers to an issue with the Glow Plug Control Module Temperature Sensor 2 Circuit registering low voltage. Common causes include Faulty glow plug control module temperature sensor 2, Wiring issues or loose connections in the temperature sensor circuit, Corrosion or damage to the sensor or its connectors. 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 temperature sensor 2, Wiring issues or loose connections in the temperature sensor circuit, Corrosion or damage to the sensor or its connectors.
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 12, 2024
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Code P101B Chevrolet Description

The P101B diagnostic trouble code for Chevrolet vehicles refers to an issue with the Glow Plug Control Module Temperature Sensor 2 Circuit registering low voltage. The glow plug control module is a crucial component in diesel engines, as it helps to regulate the temperature of the glow plugs, which are essential for starting the engine, especially in cold weather conditions. The temperature sensor 2 circuit is responsible for monitoring the temperature of the glow plug control module to ensure it is functioning within the specified parameters.

OBDII Code P101B Chevrolet - Glow Plug Control Module Temperature Sensor 2 Circuit Low Voltage
P101B Chevrolet Code - Glow Plug Control Module Temperature Sensor 2 Circuit Low Voltage

Common Causes of P101B Chevrolet

  1. Faulty glow plug control module temperature sensor 2.
  2. Wiring issues or loose connections in the temperature sensor circuit.
  3. Corrosion or damage to the sensor or its connectors.
  4. Electrical system malfunctions.
  5. Software or programming issues.

Symptoms of P101B Chevrolet

  1. Difficulty starting the engine, especially in cold weather.
  2. Rough idling or misfires.
  3. Decreased fuel efficiency.
  4. Engine stalling.

How to Fix P101B Chevrolet

  1. Begin by conducting a thorough inspection of the glow plug control module temperature sensor 2 and its circuitry.
  2. Test the sensor's resistance and voltage to determine if it is functioning correctly.
  3. Check for any loose or damaged wiring connections and repair or replace them as needed.
  4. Clear the diagnostic trouble codes from the vehicle's computer system and reset it.
  5. Test the vehicle to ensure that the issue has been resolved and that the glow plug system is functioning properly.

Cost to Fix P101B Chevrolet

The typical repair costs for addressing a P101B diagnostic trouble code can vary depending on the specific cause of the issue. In general, the cost of replacing a faulty glow plug control module temperature sensor 2 and addressing any related wiring or connector issues can range from $200 to $500, including parts and labor. However, it is important to note that the actual cost may vary based on factors such as the vehicle's make and model, the location of the repair shop, and the extent of the repairs needed. It is advisable to consult with a qualified mechanic or auto repair shop to obtain a more accurate estimate based on your specific circumstances. Additionally, diagnostic time and labor rates at auto repair shops can range from $80 to $150 per hour, with rates potentially higher at dealerships or in metropolitan areas, and lower at independent shops.

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Information for Specific Chevrolet Models

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.

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