AutoCodes – GMC – P16AE 2014 GMC Sierra

P16AE 2014 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 2014 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 233

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 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 P16AE 2014 GMC Sierra - Glow Plug Control Module Temperature Sensor Circuit High Voltage - AutoCodes.com — P16AE 2014 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 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 P16AE 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 P16AE 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 P16AE 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 P16AE 2014 GMC Sierra Code

1. What does the OBDII code P16AE mean on a 2014 GMC Sierra?

P16AE indicates a problem with the Glow Plug Control Module Temperature Sensor Circuit, specifically high voltage has been detected.

2. What are the common symptoms of a P16AE code?

Symptoms may include difficulty starting the engine in cold weather, reduced engine performance, an illuminated check engine light, or rough idling.

3. What causes the P16AE code to appear?

Common causes include a faulty temperature sensor, damaged wiring or connectors in the circuit, corrosion at electrical connections, or a malfunctioning Glow Plug Control Module.

4. Can I drive my 2014 GMC Sierra with a P16AE code?

While the vehicle may still be drivable, it is not recommended to ignore the code as it can lead to poor cold-start performance and potential long-term engine issues.

5. How do I diagnose the P16AE code?

Start by checking the wiring and connectors for damage or corrosion. Use a multimeter to test the temperature sensor's resistance and inspect the Glow Plug Control Module for proper operation.

6. How do I fix the P16AE code on my GMC Sierra?

Repairs may involve replacing the Glow Plug Control Module temperature sensor, repairing damaged wiring, cleaning corroded connectors, or replacing the Glow Plug Control Module if necessary.

7. How much does it cost to repair a P16AE code?

Repair costs vary but typically range from $150 to $500, depending on whether the issue is with the sensor, wiring, or the Glow Plug Control Module.

8. What tools are needed to fix the P16AE code?

You'll need an OBDII scanner, a multimeter to test voltage and resistance, and basic hand tools for repairing or replacing components.

9. Can a faulty Glow Plug Control Module cause other problems?

Yes, a malfunctioning module can lead to poor engine performance, difficulty starting in cold weather, and increased emissions.

10. Is the P16AE code specific to GMC vehicles?

While P16AE is a generic OBDII code, its specific meaning and application to the Glow Plug Control Module Temperature Sensor Circuit are most relevant to certain GMC and Chevrolet diesel vehicles. Always consult the service manual for your specific model.