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Engine-Codes – GMC – P16AD 2018 GMC Sierra

P16AD 2018 GMC Sierra Code - Glow Plug Control Module Temperature Sensor Circuit Low Voltage

Quick Answer

The P16AD diagnostic trouble code (DTC) for a 2018 GMC Sierra refers to the Glow Plug Control Module Temperature Sensor Circuit Low Voltage. Common causes include Faulty glow plug control module temperature sensor, Wiring or connection issues in the temperature sensor circuit, Corrosion or damage to the sensor or its wiring. 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 2018 GMC Sierra indicates Glow Plug Control Module Temperature Sensor Circuit Low Voltage.
Common causes
Common causes include Faulty glow plug control module temperature sensor, Wiring or connection issues in the temperature sensor circuit, Corrosion or damage to the sensor or its wiring.
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 13, 2024
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Code P16AD 2018 GMC Sierra Description

The P16AD diagnostic trouble code (DTC) for a 2018 GMC Sierra refers to the Glow Plug Control Module Temperature Sensor Circuit Low Voltage. This code indicates that there is a problem with the temperature sensor circuit in the glow plug control module, which is responsible for monitoring the temperature of the glow plug system. The glow plug system is crucial for diesel engines, as it helps to heat up the combustion chamber for easier starting in cold weather conditions.

OBDII Code P16AD 2018 GMC Sierra - Glow Plug Control Module Temperature Sensor Circuit Low Voltage
P16AD 2018 GMC Sierra Code - Glow Plug Control Module Temperature Sensor Circuit Low Voltage

Common Causes of P16AD 2018 GMC Sierra

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

Symptoms of P16AD 2018 GMC Sierra

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

How to Fix P16AD 2018 GMC Sierra

  1. Perform a thorough inspection of the glow plug control module temperature sensor and its wiring for any visible damage or corrosion.
  2. Test the temperature sensor using a multimeter to check for proper voltage readings.
  3. Check the fuse and relay related to the glow plug system to ensure they are functioning correctly.
  4. If the sensor is faulty, replace it with a new one and ensure proper calibration.
  5. Clear the DTC and test the vehicle to verify that the issue has been resolved.

Cost to Fix P16AD 2018 GMC Sierra

The typical repair costs for addressing a P16AD code on a 2018 GMC Sierra can vary depending on the specific cause of the issue. In general, replacing a faulty temperature sensor or addressing wiring/connection issues may cost between $150 to $300 for parts and labor. However, additional costs may apply if other components need to be replaced or if further diagnostics are required. It's recommended to consult with a professional mechanic to get an accurate estimate based on the specific circumstances of your vehicle. Keep in mind that labor rates at auto repair shops can vary, so it's advisable to inquire about rates in your local area.

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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 2018 GMC Sierra Code

1. What are common symptoms of OBDII code P16AD in a 2018 GMC Sierra related to the Glow Plug Control Module Temperature Sensor Circuit Low Voltage?

- Common symptoms include rough idling, reduced engine performance, and the illumination of the check engine light.

2. What are some possible causes of the Glow Plug Control Module Temperature Sensor Circuit Low Voltage code in a 2018 GMC Sierra?

- Potential causes may include a faulty glow plug control module, damaged wiring or connectors, a malfunctioning temperature sensor, or issues with the vehicle's electrical system.

3. How can I diagnose the Glow Plug Control Module Temperature Sensor Circuit Low Voltage issue in my 2018 GMC Sierra?

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

4. Can I continue driving my 2018 GMC Sierra with the P16AD code related to the Glow Plug Control Module Temperature Sensor Circuit Low Voltage?

- It is not recommended to drive the vehicle for an extended period with this code as it can lead to further engine issues and potential damage. It is best to address the problem promptly.

5. How can I repair the Glow Plug Control Module Temperature Sensor Circuit Low Voltage issue in my 2018 GMC Sierra?

- Repairing this issue may involve replacing the faulty glow plug control module, temperature sensor, or repairing any damaged wiring or connectors. It is advisable to have a qualified mechanic perform the necessary repairs.

6. Are there any DIY tips for addressing the OBDII code P16AD in a 2018 GMC Sierra?

- While some basic checks like inspecting wiring connections can be done by DIY enthusiasts, diagnosing and repairing issues related to the glow plug control module and temperature sensor may require specialized tools and expertise best handled by a professional mechanic.

7. How much does it typically cost to repair the Glow Plug Control Module Temperature Sensor Circuit Low Voltage problem in a 2018 GMC Sierra?

- The cost of repairs can vary depending on the specific cause of the issue, the extent of the damage, and labor rates in your area. It is recommended to obtain quotes from different auto repair shops for an accurate estimate.

8. Is the Glow Plug Control Module Temperature Sensor Circuit Low Voltage code a serious issue in a 2018 GMC Sierra?

- While the vehicle may still be operable with this code, it is important to address it promptly to prevent potential damage to the engine or other components. Ignoring the issue can lead to more costly repairs down the line.

9. Can extreme weather conditions affect the occurrence of the P16AD code in a 2018 GMC Sierra?

- Yes, extreme temperatures can impact the performance of glow plugs and temperature sensors, potentially leading to the Glow Plug Control Module Temperature Sensor Circuit Low Voltage code appearing more frequently.

10. How can I prevent the OBDII code P16AD from recurring in my 2018 GMC Sierra after repairs?

- To prevent the code from reoccurring, it is advisable to follow the manufacturer's maintenance schedule, address any related issues promptly, and ensure that all electrical components are in good working condition. Regular vehicle inspections can also help detect potential problems early on.

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