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Engine-Codes – GMC – P16AD 2015 GMC Sierra

P16AD 2015 GMC Sierra Code - Glow Plug Control Module Temperature Sensor Circuit Low Voltage

Quick Answer

The diagnostic trouble code P16AD for a 2015 GMC Sierra relates to the Glow Plug Control Module Temperature Sensor Circuit registering low voltage. Common causes include Faulty temperature sensor within the glow plug control module, Wiring or connection issues in the temperature sensor circuit, Corrosion or damage to the sensor or 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
P16AD 2015 GMC Sierra indicates Glow Plug Control Module Temperature Sensor Circuit Low Voltage.
Common causes
Common causes include Faulty temperature sensor within the glow plug control module, Wiring or connection issues in the temperature sensor circuit, Corrosion or damage to the sensor or 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 10, 2024
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Code P16AD 2015 GMC Sierra Description

The diagnostic trouble code P16AD for a 2015 GMC Sierra relates to the Glow Plug Control Module Temperature Sensor Circuit registering low voltage. This code typically indicates that there is an issue with the temperature sensor circuit within the glow plug control module of the vehicle. The glow plug control module is responsible for managing the glow plugs in a diesel engine, which are used to preheat the combustion chamber for easier starting in cold conditions.

OBDII Code P16AD 2015 GMC Sierra - Glow Plug Control Module Temperature Sensor Circuit Low Voltage
P16AD 2015 GMC Sierra Code - Glow Plug Control Module Temperature Sensor Circuit Low Voltage

Common Causes of P16AD 2015 GMC Sierra

  1. Faulty temperature sensor within the glow plug control module.
  2. Wiring or connection issues in the temperature sensor circuit.
  3. Corrosion or damage to the sensor or module.
  4. Electrical issues such as a blown fuse or relay affecting the circuit.
  5. Software or programming issues within the control module.

Symptoms of P16AD 2015 GMC Sierra

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

How to Fix P16AD 2015 GMC Sierra

  1. Begin by conducting a visual inspection of the temperature sensor, wiring, and connections for any visible damage or corrosion.
  2. Use a multimeter to test the voltage output of the temperature sensor to determine if it is within the expected range.
  3. If the sensor is faulty, replace it with a new one and ensure proper installation.
  4. Check the wiring and connections for any breaks or loose connections, repairing or replacing them as needed.
  5. Clear the diagnostic trouble codes and test the vehicle to ensure the issue has been resolved.

Cost to Fix P16AD 2015 GMC Sierra

The typical repair costs for addressing the P16AD code on a 2015 GMC Sierra can vary depending on the specific cause of the issue. Generally, the cost of a new temperature sensor can range from $50 to $150, with labor costs adding an additional $100 to $200. Overall, the total repair cost for this issue could range from $150 to $350. It's important to note that these are rough estimates, and actual costs may vary based on location, shop rates, and the extent of the repair needed. It's recommended to consult with a professional mechanic for a more accurate cost estimate.

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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 P16AD 2015 GMC Sierra Code

1. What are the common symptoms of OBDII code P16AD in a 2015 GMC Sierra related to the Glow Plug Control Module Temperature Sensor Circuit Low Voltage?

- Common symptoms include poor engine performance, decreased fuel efficiency, rough idling, and the illumination of the check engine light.

2. What are the possible causes of OBDII code P16AD in a 2015 GMC Sierra?

- Possible causes include a faulty glow plug control module, a malfunctioning temperature sensor, damaged wiring or connectors, or a weak battery.

3. How can I diagnose the Glow Plug Control Module Temperature Sensor Circuit Low Voltage issue in my 2015 GMC Sierra?

- You can diagnose this issue by using an OBDII scanner to retrieve the trouble code, visually inspecting the wiring and connectors, testing the glow plug control module and temperature sensor, and checking the battery voltage.

4. What are the repair options for fixing OBDII code P16AD in a 2015 GMC Sierra?

- Repair options may include replacing the glow plug control module, replacing the temperature sensor, repairing or replacing damaged wiring or connectors, and ensuring the battery is in good condition.

5. Can I continue driving my 2015 GMC Sierra with OBDII code P16AD present?

- It is not recommended to continue driving with this code present, as it can lead to further engine damage and decreased performance. It is best to address the issue promptly.

6. How important is it to fix OBDII code P16AD in a 2015 GMC Sierra?

- It is important to fix this code promptly to ensure proper engine performance, fuel efficiency, and to prevent potential damage to other components in the vehicle.

7. Is it possible to reset OBDII code P16AD in a 2015 GMC Sierra without fixing the underlying issue?

- While you can clear the code with an OBDII scanner, it will likely reappear if the underlying issue is not addressed. It is best to fix the root cause of the problem.

8. Can extreme weather conditions impact the occurrence of OBDII code P16AD in a 2015 GMC Sierra?

- Yes, extreme cold weather can put additional strain on the glow plug control module and temperature sensor, potentially leading to the occurrence of this code.

9. Are there any preventative maintenance steps I can take to avoid OBDII code P16AD in my 2015 GMC Sierra?

- Regularly checking and maintaining the glow plug system, ensuring proper battery health, and addressing any warning signs promptly can help prevent the occurrence of this code.

10. How much can I expect to pay for repairing OBDII code P16AD in a 2015 GMC Sierra?

- The cost of repairing this code can vary depending on the root cause of the issue, but it may involve parts and labor expenses ranging from $200 to $500 or more.

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