AutoCodes – GMC – P16AD 2015 GMC Sierra

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

Quick Answer

The Glow Plug Control Module (GPCM) has the ability to perform internal diagnostics for the temperature sensor circuit. Common causes include Faulty Glow Plug Control Module (GPCM), Glow Plug Control Module harness is open or shorted, Glow Plug Control Module circuit poor electrical connection. 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 Glow Plug Control Module (GPCM), Glow Plug Control Module harness is open or shorted, Glow Plug Control Module circuit poor electrical connection.
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.

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Code Popularity 152

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Oct 01, 2022

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P16AD 2015 GMC Sierra Description

The Glow Plug Control Module (GPCM) has the ability to perform internal diagnostics for the temperature sensor circuit. The GPCM monitors the internal temperature sensor voltage and if the voltage is less than 0.21 V or greater than 4.94 V. The GPCM will send a message to the Engine Control Module (ECM) to set the appropriate Diagnostic Trouble Code (DTC). A DTC is detected when one of the GPCM temperature sensors voltage falls outside the calibrated threshold for greater than 1.3 s.

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

What does this mean?

What are the Possible Causes of the DTC P16AD 2015 GMC Sierra?

Faulty Glow Plug Control Module (GPCM)
Glow Plug Control Module harness is open or shorted
Glow Plug Control Module circuit poor electrical connection

How to Fix the DTC P16AD 2015 GMC Sierra?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P16AD 2015 GMC Sierra code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the P16AD 2015 GMC Sierra code?

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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.