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Engine-Codes – GMC – P101F GMC

P101F GMC Code - Glow Plug Control Module Temperature Sensor 1 Not Plausible

Quick Answer

The P101F diagnostic trouble code (DTC) for GMC vehicles refers to an issue with the Glow Plug Control Module Temperature Sensor 1, indicating that the sensor's readings are not plausible. Common causes include Faulty glow plug control module temperature sensor, Wiring or electrical issues in the sensor circuit, Corrosion or damage to the sensor 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
P101F GMC indicates Glow Plug Control Module Temperature Sensor 1 Not Plausible.
Common causes
Common causes include Faulty glow plug control module temperature sensor, Wiring or electrical issues in the sensor circuit, Corrosion or damage to the sensor 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 10, 2024
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Code P101F GMC Description

The P101F diagnostic trouble code (DTC) for GMC vehicles refers to an issue with the Glow Plug Control Module Temperature Sensor 1, indicating that the sensor's readings are not plausible. The glow plug control module is a crucial component in diesel engines that helps to preheat the engine cylinders before starting, especially in cold weather conditions. The temperature sensor plays a key role in monitoring the temperature of the glow plug control module to ensure optimal performance.

OBDII Code P101F GMC - Glow Plug Control Module Temperature Sensor 1 Not Plausible
P101F GMC Code - Glow Plug Control Module Temperature Sensor 1 Not Plausible

Common Causes of P101F GMC

  1. Faulty glow plug control module temperature sensor
  2. Wiring or electrical issues in the sensor circuit
  3. Corrosion or damage to the sensor connectors
  4. Engine overheating affecting sensor readings
  5. Software or calibration issues in the engine control module

Symptoms of P101F GMC

  1. Difficulty starting the engine, especially in cold weather
  2. Rough idling or vibrations when the engine is running
  3. Decreased fuel efficiency
  4. Misfires or hesitation during acceleration
  5. Illumination of the check engine light on the dashboard

How to Fix P101F GMC

  1. Diagnose the issue by using a scan tool to retrieve the specific DTC and verify the sensor's readings.
  2. Inspect the wiring and connectors of the temperature sensor for any damage or corrosion.
  3. Replace the glow plug control module temperature sensor if it is faulty or providing inaccurate readings.
  4. Clear the DTC and reset the engine control module to ensure the repair is successful.
  5. Test the vehicle to verify that the issue has been resolved and that the sensor is now functioning correctly.

Cost to Fix P101F GMC

The typical repair costs for addressing a P101F DTC related to the Glow Plug Control Module Temperature Sensor 1 can range from $150 to $300, including parts and labor. However, actual costs may vary depending on factors such as the vehicle's make and model, the location of the repair shop, and any additional components that may need to be replaced. It is recommended to obtain quotes from local auto repair shops to get a more accurate estimate based on your specific situation. Remember that diagnosis time and labor rates can also impact the final cost of the repair.

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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 P101F GMC Code

1. What are the common symptoms of OBDII code P101F GMC?

The common symptoms of OBDII code P101F GMC include poor engine performance, rough idling, engine misfires, and potentially decreased fuel efficiency.

2. What does the OBDII code P101F GMC indicate?

The OBDII code P101F GMC indicates a problem with the Glow Plug Control Module Temperature Sensor 1, specifically that the temperature reading is not plausible.

3. What are the possible causes of OBDII code P101F GMC?

Possible causes of OBDII code P101F GMC include a faulty glow plug control module, a malfunctioning temperature sensor, wiring issues, or a poor connection in the electrical system.

4. How can I diagnose the issue related to OBDII code P101F GMC?

To diagnose the issue related to OBDII code P101F GMC, you can use an OBDII scanner to read the code and then inspect the glow plug control module, temperature sensor, and related wiring for any visible damage or defects.

5. How serious is OBDII code P101F GMC?

OBDII code P101F GMC should be addressed promptly to prevent potential damage to the glow plug system and ensure optimal engine performance. Ignoring this code may lead to starting difficulties or rough running conditions.

6. Can I still drive my vehicle with OBDII code P101F GMC?

It is not recommended to drive your vehicle with OBDII code P101F GMC, as it can affect engine performance and potentially lead to more serious issues if left unaddressed. It is best to have the problem diagnosed and repaired as soon as possible.

7. How much does it typically cost to repair OBDII code P101F GMC?

The cost of repairing OBDII code P101F GMC can vary depending on the specific cause of the issue. It may involve replacing the glow plug control module, temperature sensor, or addressing wiring problems. Costs can range from a couple of hundred dollars to over a thousand dollars.

8. Can I repair OBDII code P101F GMC myself?

If you have the necessary tools, knowledge, and experience working on automotive electrical systems, you may be able to repair OBDII code P101F GMC yourself. However, it is recommended to consult a professional mechanic for an accurate diagnosis and proper repair.

9. Can a faulty glow plug control module cause OBDII code P101F GMC?

Yes, a faulty glow plug control module can cause OBDII code P101F GMC, as it may affect the proper functioning of the temperature sensor and lead to inaccurate temperature readings.

10. How can I prevent OBDII code P101F GMC from occurring again?

To prevent OBDII code P101F GMC from occurring again, it is essential to perform regular maintenance on your vehicle, including checking the glow plug system for any signs of wear or damage. Additionally, addressing any issues promptly can help prevent this code from reoccurring.

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