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Engine-Codes – GMC – P16E5 2014 GMC Sierra

P16E5 2014 GMC Sierra Code - Sensor Communication Circuit 3 High Voltage

Quick Answer

The P16E5 diagnostic trouble code (DTC) for a 2014 GMC Sierra indicates an issue with the Sensor Communication Circuit 3, specifically reporting high voltage. Common causes include Damaged Wiring or Connectors: Corrosion, fraying, or breaks in the wiring or connectors associated with Sensor Communication Circuit 3 can cause high voltage readings, Faulty Sensor: A malfunctioning sensor itself can send incorrect data to the ECM, triggering the P16E5 code, ECM Malfunction: A problem with the engine control module can also lead to high voltage in the sensor communication circuit. 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
P16E5 2014 GMC Sierra indicates Sensor Communication Circuit 3 High Voltage.
Common causes
Common causes include Damaged Wiring or Connectors: Corrosion, fraying, or breaks in the wiring or connectors associated with Sensor Communication Circuit 3 can cause high voltage readings, Faulty Sensor: A malfunctioning sensor itself can send incorrect data to the ECM, triggering the P16E5 code, ECM Malfunction: A problem with the engine control module can also lead to high voltage in the sensor communication circuit.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 15, 2024
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Code P16E5 2014 GMC Sierra Description

The P16E5 diagnostic trouble code (DTC) for a 2014 GMC Sierra indicates an issue with the Sensor Communication Circuit 3, specifically reporting high voltage. This code typically points to a problem with the communication between the sensor and the vehicle's onboard computer system. In this case, Sensor Communication Circuit 3 refers to the wiring and connections associated with the third sensor in the vehicle.

OBDII Code P16E5 2014 GMC Sierra - Sensor Communication Circuit 3 High Voltage
P16E5 2014 GMC Sierra Code - Sensor Communication Circuit 3 High Voltage

Common Causes of P16E5 2014 GMC Sierra

  1. Damaged Wiring or Connectors: Corrosion, fraying, or breaks in the wiring or connectors associated with Sensor Communication Circuit 3 can cause high voltage readings.
  2. Faulty Sensor: A malfunctioning sensor itself can send incorrect data to the ECM, triggering the P16E5 code.
  3. ECM Malfunction: A problem with the engine control module can also lead to high voltage in the sensor communication circuit.
  4. Short Circuits: Electrical shorts in the circuit can cause voltage spikes, triggering the code.

Symptoms of P16E5 2014 GMC Sierra

  1. Check Engine Light: The most common symptom associated with the P16E5 code is the illumination of the check engine light on the vehicle's dashboard.
  2. Reduced Engine Performance: The vehicle may experience reduced power, hesitation, or rough idling due to incorrect sensor data being sent to the ECM.
  3. Poor Fuel Efficiency: High voltage in the sensor communication circuit can lead to inaccurate fuel mixture calculations, resulting in decreased fuel efficiency.
  4. Emissions Issues: The vehicle may fail emissions tests due to the improper functioning of the sensor communication circuit.

How to Fix P16E5 2014 GMC Sierra

  1. Diagnose the Issue: Use a diagnostic scanner to retrieve the specific trouble code and perform further testing to identify the exact cause of the high voltage reading.
  2. Inspect Wiring and Connectors: Check the wiring and connectors associated with Sensor Communication Circuit 3 for any damage or corrosion. Repair or replace as needed.
  3. Test the Sensor: Test the sensor itself to ensure it is functioning correctly. Replace if necessary.
  4. Check the ECM: Inspect the engine control module for any signs of malfunction. Repair or replace as needed.
  5. Clear Codes and Test Drive: After making repairs, clear the trouble codes from the vehicle's computer system and take the vehicle for a test drive to ensure the issue has been resolved.

Cost to Fix P16E5 2014 GMC Sierra

The typical repair costs for addressing a P16E5 code on a 2014 GMC Sierra can vary depending on the specific cause of the issue. In general, the cost of parts for this repair could range from $100 to $300, with labor costs adding an additional $100 to $200. Overall, the total repair cost could fall between $200 and $500.

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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 P16E5 2014 GMC Sierra Code

1. What are the common symptoms of OBDII code P16E5 in a 2014 GMC Sierra?

- Common symptoms include poor engine performance, rough idle, reduced fuel efficiency, and potential stalling.

2. What does the "Sensor Communication Circuit 3 High Voltage" mean in relation to code P16E5?

- This means that there is a high voltage reading detected in the communication circuit of sensor 3, indicating a potential issue with its operation.

3. What are the possible causes of OBDII code P16E5 in a 2014 GMC Sierra?

- Possible causes include a faulty sensor, damaged wiring or connectors, a defective control module, or issues with the sensor's power supply.

4. How can I diagnose the cause of OBDII code P16E5 in my GMC Sierra?

- A thorough inspection of the sensor, wiring, and connectors is recommended. Using a multimeter to test voltage readings can help pinpoint the issue.

5. Can driving with OBDII code P16E5 cause further damage to my 2014 GMC Sierra?

- Continuing to drive with this code may lead to engine performance issues and potentially cause damage to other components over time. It is advisable to address the issue promptly.

6. Is it safe to continue driving my GMC Sierra with OBDII code P16E5?

- While the vehicle may still be operable, it is recommended to have the issue diagnosed and repaired as soon as possible to prevent further complications.

7. Can I reset the OBDII code P16E5 in my 2014 GMC Sierra on my own?

- Yes, you can reset the code using an OBDII scanner, but it is important to address the underlying issue causing the code to prevent it from reoccurring.

8. How much does it typically cost to repair OBDII code P16E5 in a 2014 GMC Sierra?

- The cost of repair can vary depending on the exact cause of the code, but it may involve replacing a faulty sensor, repairing wiring, or addressing issues with the control module. Costs can range from $100 to $500 or more.

9. Can a DIY enthusiast fix OBDII code P16E5 in a 2014 GMC Sierra?

- Depending on the cause of the code, some DIY enthusiasts with automotive knowledge and tools may be able to address the issue themselves by replacing the sensor or repairing wiring.

10. How long does it take to repair OBDII code P16E5 in a 2014 GMC Sierra?

- The repair time can vary based on the specific cause of the code and the complexity of the repair. It may take anywhere from 1 to 4 hours for a mechanic to diagnose and fix the issue.

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