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P16E5 2017 GMC Sierra Code - Sensor Communication Circuit 3 High Voltage

Quick Answer

The P16E5 diagnostic trouble code (DTC) for a 2017 GMC Sierra indicates an issue with the Sensor Communication Circuit 3 being at a high voltage. Common causes include Faulty sensor in Communication Circuit 3, Damaged wiring or connectors in the sensor circuit, Corrosion or poor connections in the sensor 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 2017 GMC Sierra indicates Sensor Communication Circuit 3 High Voltage.
Common causes
Common causes include Faulty sensor in Communication Circuit 3, Damaged wiring or connectors in the sensor circuit, Corrosion or poor connections in the sensor 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 08, 2024
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Code P16E5 2017 GMC Sierra Description

The P16E5 diagnostic trouble code (DTC) for a 2017 GMC Sierra indicates an issue with the Sensor Communication Circuit 3 being at a high voltage. This code typically points to a problem with the communication between sensors in the vehicle's system, specifically Sensor Circuit 3. The sensors in modern vehicles play a crucial role in monitoring various parameters and sending signals to the engine control module (ECM) for proper operation.

OBDII Code P16E5 2017 GMC Sierra - Sensor Communication Circuit 3 High Voltage
P16E5 2017 GMC Sierra Code - Sensor Communication Circuit 3 High Voltage

Common Causes of P16E5 2017 GMC Sierra

  1. Faulty sensor in Communication Circuit 3
  2. Damaged wiring or connectors in the sensor circuit
  3. Corrosion or poor connections in the sensor circuit
  4. ECM malfunction or software issue
  5. Environmental factors such as water intrusion or heat damage

Symptoms of P16E5 2017 GMC Sierra

  1. Decreased fuel efficiency
  2. Rough idling or running rough
  3. Hesitation or lack of power during acceleration
  4. Engine stalling
  5. Warning light illuminated on the dashboard

How to Fix P16E5 2017 GMC Sierra

  1. Begin by conducting a thorough inspection of the Sensor Communication Circuit 3, checking for any visible damage to wiring or connectors.
  2. Test the sensor in Circuit 3 to determine if it is functioning properly or needs replacement.
  3. Check for any corrosion or poor connections in the circuit and clean or repair as necessary.
  4. If the issue persists, test the ECM for proper operation and reprogram if needed.
  5. Clear the DTC from the ECM memory and test drive the vehicle to ensure the issue has been resolved.

Cost to Fix P16E5 2017 GMC Sierra

The cost of repairing a Sensor Communication Circuit 3 High Voltage issue on a 2017 GMC Sierra can vary depending on the exact cause of the problem and the extent of repairs needed. Typically, parts for this repair may range from $100 to $300, while labor costs can vary from $150 to $400, depending on the shop's hourly rates and the complexity of the repair. Overall, the total cost for addressing this issue could range from $250 to $700. It's recommended to consult with a qualified mechanic or dealership for a precise cost estimate based on the specific circumstances of the vehicle.

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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 2017 GMC Sierra Code

1. What are the common symptoms of OBDII code P16E5 in a 2017 GMC Sierra?

- Common symptoms include engine stalling, rough idling, decreased fuel efficiency, and the illumination of the check engine light.

2. What does the OBDII code P16E5 "Sensor Communication Circuit 3 High Voltage" indicate in a 2017 GMC Sierra?

- The code indicates that there is a high voltage condition detected in the sensor communication circuit 3.

3. What can cause the OBDII code P16E5 to trigger in a 2017 GMC Sierra?

- Possible causes include a faulty sensor, damaged wiring or connectors in the communication circuit, or an issue with the powertrain control module (PCM).

4. How can I diagnose the OBDII code P16E5 in my 2017 GMC Sierra?

- Diagnosing the code typically involves using a scan tool to retrieve and analyze the fault codes, inspecting the sensor and related wiring, and testing the sensor's voltage and signals.

5. Is it safe to continue driving my 2017 GMC Sierra with the P16E5 code present?

- It is generally not recommended to drive the vehicle with the code active, as it can lead to further damage and potential safety hazards.

6. How can I repair the OBDII code P16E5 in my 2017 GMC Sierra?

- Repair options may include replacing the faulty sensor, repairing damaged wiring or connectors, or reprogramming the PCM if necessary.

7. Can I reset the check engine light after fixing the P16E5 code in my 2017 GMC Sierra?

- Yes, after repairing the issue causing the code, you can reset the check engine light using an OBDII scan tool.

8. Are there any preventive maintenance tips to avoid the P16E5 code in a 2017 GMC Sierra?

- Regularly inspecting and maintaining sensors, wiring, and connectors can help prevent issues that may trigger the P16E5 code.

9. How much does it typically cost to repair the P16E5 code in a 2017 GMC Sierra?

- The cost of repair can vary depending on the specific issue causing the code, but it may range from a few hundred to a thousand dollars, including parts and labor.

10. Can a DIY enthusiast fix the P16E5 code in a 2017 GMC Sierra?

- Depending on your skill level and access to tools, you may be able to diagnose and repair the issue causing the code, but complex electrical issues may require professional assistance.

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