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Engine-Codes – GMC – P102D GMC

P102D GMC Code - Glow Plug Control Module Temperature Sensor 2 Not Plausible

Quick Answer

The P102D code for GMC vehicles indicates a problem with the Glow Plug Control Module Temperature Sensor 2. Common causes include Faulty glow plug control module temperature sensor, Wiring or connection issues in the sensor circuit, Corrosion or damage to the sensor. 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
P102D GMC indicates Glow Plug Control Module Temperature Sensor 2 Not Plausible.
Common causes
Common causes include Faulty glow plug control module temperature sensor, Wiring or connection issues in the sensor circuit, Corrosion or damage to the sensor.
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 P102D GMC Description

The P102D code for GMC vehicles indicates a problem with the Glow Plug Control Module Temperature Sensor 2. This sensor is responsible for monitoring the temperature of the glow plug control module, which is crucial for the efficient operation of the glow plugs in a diesel engine. When the temperature sensor detects a reading that is not plausible or within the expected range, it triggers the P102D diagnostic trouble code (DTC).

OBDII Code P102D GMC - Glow Plug Control Module Temperature Sensor 2 Not Plausible
P102D GMC Code - Glow Plug Control Module Temperature Sensor 2 Not Plausible

Common Causes of P102D GMC

  1. Faulty glow plug control module temperature sensor.
  2. Wiring or connection issues in the sensor circuit.
  3. Corrosion or damage to the sensor.
  4. Engine overheating affecting sensor readings.
  5. ECM software or hardware issues.

Symptoms of P102D GMC

  1. Difficulty starting the engine, especially in cold weather.
  2. Reduced fuel efficiency.
  3. Illumination of the Check Engine Light.
  4. Rough idling or misfiring of the engine.
  5. Increased exhaust emissions.

How to Fix P102D GMC

  1. Begin by performing a thorough inspection of the glow plug control module temperature sensor and its wiring for any visible damage or corrosion.
  2. Use a multimeter to test the sensor's resistance and voltage output to determine if it is functioning correctly.
  3. If the sensor is faulty, replace it with a new one following the manufacturer's guidelines.
  4. Clear the DTC from the vehicle's ECM using an OBD-II scanner and monitor the sensor's readings to ensure they are within the expected range.
  5. Test the vehicle to confirm that the issue has been resolved and that the engine starts smoothly, especially in cold conditions.

Cost to Fix P102D GMC

The cost of repairing a Glow Plug Control Module Temperature Sensor 2 Not Plausible code can vary depending on the vehicle's make and model, as well as the specific components that need to be replaced. In general, the cost of a new glow plug control module temperature sensor can range from $50 to $150, while the labor cost for installation can be around $100 to $200. Overall, the total repair cost can be estimated to be between $150 and $350. It's important to note that these are rough estimates, and actual costs may vary based on the factors mentioned earlier.

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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 P102D GMC Code

1. What are the common symptoms of OBDII code P102D indicating Glow Plug Control Module Temperature Sensor 2 Not Plausible?

- Common symptoms include rough idling, decreased fuel efficiency, difficulty starting the vehicle, and illuminated Check Engine Light.

2. What could be the possible causes of OBDII code P102D related to Glow Plug Control Module Temperature Sensor 2?

- Potential causes may include a faulty temperature sensor, wiring issues, a malfunctioning glow plug control module, or a software glitch in the vehicle's computer system.

3. How can I diagnose the issue causing OBDII code P102D in my GMC vehicle?

- Diagnosis typically involves using an OBDII scanner to retrieve the specific trouble code, checking the glow plug control module and temperature sensor for proper functioning, and inspecting the wiring for any damage or loose connections.

4. Is it safe to continue driving my vehicle with OBDII code P102D present?

- It is not recommended to drive the vehicle with this code present, as it can lead to further damage and potential safety hazards. It's best to address the issue promptly.

5. Can I repair OBDII code P102D myself, or should I seek professional help?

- While some DIY enthusiasts may be able to troubleshoot and repair this issue, it is generally recommended to seek professional help, especially if you are not familiar with automotive diagnostics and repairs.

6. Are there any quick fixes or temporary solutions for OBDII code P102D?

- Quick fixes such as resetting the trouble code using an OBDII scanner may temporarily clear the Check Engine Light, but the underlying issue should still be addressed to prevent further problems.

7. How much does it typically cost to repair OBDII code P102D related to the Glow Plug Control Module Temperature Sensor 2?

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

8. Can extreme weather conditions impact the likelihood of triggering OBDII code P102D in a GMC vehicle?

- Yes, extreme cold or hot weather conditions can sometimes affect the performance of glow plug control modules and temperature sensors, potentially leading to the triggering of this trouble code.

9. Will OBDII code P102D cause any long-term damage to my GMC vehicle if left unrepaired?

- Ignoring this code can lead to reduced engine performance, increased emissions, and potential damage to other engine components over time. It's best to address the issue promptly to prevent further damage.

10. How long does it typically take to repair OBDII code P102D in a GMC vehicle?

- The repair time can vary depending on the exact cause of the issue and the availability of parts. In general, it may take a few hours to a full day to diagnose and repair the problem related to Glow Plug Control Module Temperature Sensor 2 Not Plausible.

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