AutoCodes – Cadillac – P16AE Cadillac

P16AE Cadillac 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 Cadillac 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 306

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

What does this mean?

What are the Possible Causes of the DTC P16AE Cadillac?

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 Cadillac?

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 Cadillac 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 Cadillac Code

1. What are the common symptoms of OBDII code P16AE in a Cadillac related to the Glow Plug Control Module Temperature Sensor Circuit High Voltage?

The common symptoms include the check engine light being illuminated, poor engine performance, reduced fuel efficiency, and potential rough idling.

2. What are the possible causes of OBDII code P16AE in a Cadillac?

Possible causes include a faulty glow plug control module, issues with the temperature sensor circuit, wiring or connector problems, or a malfunctioning temperature sensor itself.

3. How can I diagnose the cause of OBDII code P16AE in my Cadillac?

To diagnose the issue, it is recommended to use an OBDII scanner to retrieve the specific trouble code and freeze frame data. Additionally, conducting a visual inspection of the wiring and connectors related to the glow plug control module and temperature sensor can help identify any obvious issues.

4. Can I still drive my Cadillac with OBDII code P16AE present?

While it may be possible to drive the vehicle with this code present, it is not recommended as it can lead to further damage to the engine components and decreased fuel efficiency. It is best to address the issue promptly.

5. How can I repair OBDII code P16AE in my Cadillac?

Repairing this code may involve replacing the faulty glow plug control module, repairing or replacing any damaged wiring or connectors, or replacing the temperature sensor if needed. It is recommended to consult a professional mechanic for proper diagnosis and repair.

6. Are there any DIY tips for addressing OBDII code P16AE in a Cadillac?

DIY tips include checking the wiring and connectors for any visible damage, ensuring proper connection of the temperature sensor, and clearing the code with an OBDII scanner to see if it returns.

7. Can a faulty glow plug control module cause OBDII code P16AE in a Cadillac?

Yes, a faulty glow plug control module can indeed cause this trouble code to appear due to its impact on the temperature sensor circuit operation.

8. What role does the temperature sensor play in the Glow Plug Control Module in a Cadillac?

The temperature sensor is crucial for providing accurate temperature readings to the glow plug control module, which helps regulate the glow plug operation for efficient engine starting in cold conditions.

9. Will resetting the OBDII code P16AE in my Cadillac make it go away permanently?

Resetting the code may temporarily turn off the check engine light, but if the underlying issue causing the code is not addressed, it is likely to return. It is essential to diagnose and fix the root cause to prevent the code from reoccurring.

10. Is OBDII code P16AE specific to Cadillac vehicles only?

While this specific trouble code may be more common in Cadillac vehicles, similar codes related to glow plug control module temperature sensor circuit issues can occur in other vehicle makes and models as well.