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Engine-Codes – Generic – P101D

P101D Code - Glow Plug Control Module Temperature Sensor 3 Circuit Low Voltage

Quick Answer

The P101D diagnostic trouble code indicates a problem with the Glow Plug Control Module Temperature Sensor 3 Circuit, specifically, a low voltage condition has been detected. Common causes include Faulty glow plug control module temperature sensor, Damaged wiring or connectors in the circuit, Malfunctioning glow plug control module. 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
P101D indicates Glow Plug Control Module Temperature Sensor 3 Circuit Low Voltage.
Common causes
Common causes include Faulty glow plug control module temperature sensor, Damaged wiring or connectors in the circuit, Malfunctioning glow plug control module.
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 07, 2024
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Code P101D Description

The P101D diagnostic trouble code indicates a problem with the Glow Plug Control Module Temperature Sensor 3 Circuit, specifically, a low voltage condition has been detected. Glow plugs are crucial components in diesel engines as they heat the combustion chamber to facilitate cold starts. The glow plug control module is responsible for controlling the operation of the glow plugs based on various temperature and engine parameters. The temperature sensor on the glow plug control module monitors the temperature of the module itself to ensure proper functioning.

OBDII Code P101D - Glow Plug Control Module Temperature Sensor 3 Circuit Low Voltage
P101D Code - Glow Plug Control Module Temperature Sensor 3 Circuit Low Voltage

Common Causes of P101D

  1. Faulty glow plug control module temperature sensor.
  2. Damaged wiring or connectors in the circuit.
  3. Malfunctioning glow plug control module.
  4. Issues with the vehicle's electrical system.

Symptoms of P101D

  1. Difficulty starting the engine, especially in cold weather.
  2. Rough idling or engine misfires.
  3. Decreased fuel efficiency.
  4. Check engine light illuminated on the dashboard.

How to Fix P101D

  1. Begin by diagnosing the exact cause of the low voltage condition in the glow plug control module temperature sensor 3 circuit using a diagnostic scanner.
  2. Check the wiring and connectors for any signs of damage or corrosion. Repair or replace as necessary.
  3. Test the glow plug control module temperature sensor for proper function. Replace if found to be faulty.
  4. Inspect the glow plug control module for any issues and replace if necessary.
  5. Clear the diagnostic trouble codes and test the vehicle to ensure the issue has been resolved.

Cost to Fix P101D

The cost of repairing a Glow Plug Control Module Temperature Sensor 3 Circuit Low Voltage issue can vary depending on the specific cause of the problem and the make and model of the vehicle. In general, the cost of parts for this repair can range from $50 to $200, with labor costs adding an additional $100 to $300. Overall, the total repair cost for this issue may range from $150 to $500. It's essential to consult with a professional mechanic to get an accurate estimate based on your vehicle's unique circumstances. Labor rates can vary significantly, so it's advisable to shop around for the best price.

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Code P101D Information for Specific Makes

  • P101D Buick — Glow Plug Control Module Temperature Sensor 3 Circuit Low Voltage
  • P101D Cadillac — Glow Plug Control Module Temperature Sensor 3 Circuit Low Voltage
  • P101D Chevrolet — Glow Plug Control Module Temperature Sensor 3 Circuit Low Voltage
  • P101D GMC — Glow Plug Control Module Temperature Sensor 3 Circuit Low Voltage
  • P101D Lexus — Air-Fuel Ratio Sensor Heater Circuit Performance Bank 1 Sensor 1 Stuck ON
  • P101D Scion — Air-Fuel Ratio Sensor Heater Circuit Performance Bank 1 Sensor 1 Stuck ON
  • P101D Toyota — Air-Fuel Ratio Sensor Heater Circuit Performance Bank 1 Sensor 1 Stuck ON
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 P101D Code

1. What are the common symptoms of OBDII code P101D (Glow Plug Control Module Temperature Sensor 3 Circuit Low Voltage)?

- Common symptoms include rough idling, poor engine performance, decreased fuel efficiency, and possibly a check engine light.

2. What are the possible causes of OBDII code P101D?

- The code P101D can be triggered by issues such as a faulty glow plug control module temperature sensor, damaged wiring or connectors, or a malfunctioning control module.

3. How can I diagnose the underlying issue causing code P101D?

- Diagnosing the issue involves using a scan tool to retrieve the code, checking the sensor's wiring and connections for damage, and testing the sensor's resistance and voltage output.

4. Can I drive my vehicle with OBDII code P101D?

- It is not recommended to drive your vehicle with an unresolved P101D code, as it can lead to further engine damage and decreased performance over time.

5. How can I repair OBDII code P101D?

- Repairing the P101D code may involve replacing the faulty glow plug control module temperature sensor, repairing damaged wiring or connectors, or replacing the control module if necessary.

6. Are there any tips to prevent OBDII code P101D from recurring?

- Regular maintenance of the glow plug system, including checking the sensor and related components, can help prevent the reoccurrence of the P101D trouble code.

7. What are the potential risks of ignoring OBDII code P101D?

- Ignoring the P101D code can lead to poor engine performance, increased fuel consumption, and potential damage to other engine components over time.

8. Can a DIY enthusiast resolve OBDII code P101D at home?

- Depending on your mechanical skills and access to tools, some DIY enthusiasts may be able to diagnose and repair the P101D code at home. However, seeking professional help is recommended for accurate diagnosis and repair.

9. Is OBDII code P101D specific to certain vehicle makes and models?

- The P101D code may be specific to certain vehicle makes and models, particularly those equipped with glow plug control modules and temperature sensors in their diesel engines.

10. How much can I expect to pay for repairs related to OBDII code P101D?

- Repair costs for the P101D code can vary depending on the underlying issue and the labor rates in your area. It is advisable to get a diagnosis from a professional technician to determine the exact repair costs.

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