AutoCodes – Buick – P16AE Buick

P16AE Buick 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 Buick 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 368

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

What does this mean?

What are the Possible Causes of the DTC P16AE Buick?

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 Buick?

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 Buick 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.

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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 Buick Code

1. What does the OBDII code P16AE mean on a Buick?

P16AE indicates an issue with the Glow Plug Control Module Temperature Sensor Circuit, specifically high voltage detected in the circuit.

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

Symptoms may include an illuminated check engine light, difficulty starting the engine in cold weather, reduced engine performance, or the glow plug system not functioning properly.

3. What causes the P16AE code to appear on a Buick?

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

4. Can I drive my Buick with the P16AE code?

Driving with the P16AE code is possible, but it may lead to poor cold start performance and reduced engine efficiency. Prompt diagnosis and repair are recommended to prevent further issues.

5. How do you diagnose the P16AE code on a Buick?

Diagnosis involves using an OBDII scanner to confirm the code, visually inspecting the sensor and wiring for damage, and testing the temperature sensor and related circuits with a multimeter.

6. How is the P16AE code fixed on a Buick?

Repairs may include replacing the glow plug control module temperature sensor, repairing or replacing damaged wiring, or replacing the glow plug control module if it's faulty.

7. What tools are needed to fix the P16AE code on a Buick?

Common tools include an OBDII scanner, multimeter, basic hand tools, and potentially a replacement glow plug control module temperature sensor.

8. How much does it cost to fix the P16AE code on a Buick?

Repair costs can vary, but replacing a glow plug control module temperature sensor typically costs $100-$300, including parts and labor.

9. Can a P16AE code be caused by a dead battery?

Unlikely, but a weak or dead battery can contribute to electrical issues that might indirectly affect the glow plug system. It's worth checking the battery and charging system.

10. Will clearing the P16AE code fix the problem?

Clearing the code may temporarily turn off the check engine light, but the underlying issue must be resolved to prevent the code from returning.