AutoCodes – GMC – P16AD 2014 GMC Sierra

P16AD 2014 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 2014 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 142

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 2014 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 2014 GMC Sierra - Glow Plug Control Module Temperature Sensor Circuit Low Voltage - AutoCodes.com — P16AD 2014 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 2014 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 2014 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 2014 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 2014 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 2014 GMC Sierra Code

1. What are the common symptoms of OBDII code P16AD in a 2014 GMC Sierra related to the Glow Plug Control Module Temperature Sensor Circuit Low Voltage?

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

2. What are the possible causes of OBDII code P16AD in a 2014 GMC Sierra?

- The code P16AD can be triggered by issues such as a faulty glow plug control module, damaged wiring or connectors, or a malfunctioning temperature sensor.

3. How can I diagnose the Glow Plug Control Module Temperature Sensor Circuit Low Voltage issue in a 2014 GMC Sierra?

- Diagnosing the problem involves using an OBDII scanner to retrieve the fault code, conducting a visual inspection of the wiring and connectors, and testing the glow plug control module and temperature sensor.

4. Can I continue driving my 2014 GMC Sierra with OBDII code P16AD present?

- It is not recommended to continue driving the vehicle with this fault code present, as it can lead to further damage and potential engine issues.

5. What is the typical repair process for addressing OBDII code P16AD in a 2014 GMC Sierra?

- The repair process usually involves replacing the faulty glow plug control module, repairing or replacing damaged wiring or connectors, and testing the system to ensure proper functionality.

6. Are there any DIY tips for resolving OBDII code P16AD in a 2014 GMC Sierra?

- While some basic inspections and checks can be done by DIY enthusiasts, it is recommended to consult a professional mechanic for accurate diagnosis and repair of this issue.

7. How much does it cost to repair the Glow Plug Control Module Temperature Sensor Circuit Low Voltage problem in a 2014 GMC Sierra?

- The cost of repair can vary depending on the extent of the damage and the specific components that need to be replaced, but it typically ranges from $200 to $500.

8. Can extreme weather conditions affect the occurrence of OBDII code P16AD in a 2014 GMC Sierra?

- Yes, extreme cold temperatures can put additional strain on the glow plug system, potentially leading to issues with the temperature sensor circuit and triggering the P16AD fault code.

9. Is it possible for a software update to resolve OBDII code P16AD in a 2014 GMC Sierra?

- In some cases, a software update from the manufacturer may address certain issues related to the glow plug control module temperature sensor circuit, so it's worth checking with a dealership or authorized service center.

10. How can I prevent future occurrences of OBDII code P16AD in my 2014 GMC Sierra?

- Regular maintenance, including checking the glow plug system components, ensuring proper insulation of wiring, and addressing any issues promptly, can help prevent the recurrence of this fault code.