AutoCodes – GMC – P16AE 2017 GMC Sierra

P16AE 2017 GMC Sierra Code - Glow Plug Control Module Temperature Sensor Circuit High 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: P16AE 2017 GMC Sierra indicates Glow Plug Control Module Temperature Sensor Circuit High 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 175

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

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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 P16AE 2017 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 P16AE 2017 GMC Sierra - Glow Plug Control Module Temperature Sensor Circuit High Voltage - AutoCodes.com — P16AE 2017 GMC Sierra Code - Glow Plug Control Module Temperature Sensor Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P16AE 2017 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 P16AE 2017 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 P16AE 2017 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 P16AE 2017 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 P16AE 2017 GMC Sierra Code

1. What does OBDII code P16AE mean on a 2017 GMC Sierra?

Code P16AE indicates a high voltage issue in the Glow Plug Control Module Temperature Sensor Circuit, which monitors engine temperature for proper glow plug operation.

2. What are the symptoms of code P16AE on a 2017 GMC Sierra?

Common symptoms include difficulty starting in cold weather, reduced engine performance, and an illuminated check engine light.

3. What causes the P16AE code to appear?

Potential causes include a faulty glow plug control module temperature sensor, damaged or corroded wiring, poor electrical connections, or a malfunctioning control module.

4. Can I continue driving with code P16AE on my 2017 GMC Sierra?

While the vehicle may still run, prolonged driving with this code could lead to harder starts in cold weather and potential damage to related components. Prompt diagnosis and repair are recommended.

5. How is the P16AE code diagnosed?

A technician typically uses a scan tool to check the code, inspects the temperature sensor and wiring for damage or corrosion, and tests the sensorâ€™s voltage and resistance.

6. How do you fix the P16AE code?

Repairs may include replacing the glow plug control module temperature sensor, repairing or replacing damaged wiring, cleaning corroded connections, or reprogramming/replacing the glow plug control module.

7. How much does it cost to repair code P16AE on a 2017 GMC Sierra?

The repair cost can vary, but replacing the temperature sensor typically ranges from $100 to $300, including parts and labor. Wiring repairs or module replacement may cost more.

8. Can a bad glow plug cause the P16AE code?

No, this code specifically relates to the temperature sensor circuit in the glow plug control module, not the glow plugs themselves.

9. What tools are needed to troubleshoot the P16AE code?

Tools may include a scan tool or OBDII reader, a multimeter for voltage and resistance testing, and basic hand tools for inspecting and replacing components.

10. Is the P16AE code covered under warranty for a 2017 GMC Sierra?

It depends on the vehicleâ€™s warranty status and coverage terms. Check with your dealership to see if the repair qualifies under the powertrain or emissions warranty.