Engine-Codes.com
Engine-Codes – GMC – P16E5 2018 GMC Sierra

P16E5 2018 GMC Sierra Code - Sensor Communication Circuit 3 High Voltage

Quick Answer

The P16E5 diagnostic trouble code (DTC) specifically refers to an issue with the Sensor Communication Circuit 3 in a 2018 GMC Sierra. Common causes include Damaged wiring or connectors in the sensor communication circuit, Faulty sensor, Malfunctioning ECM/PCM. 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 2018 GMC Sierra indicates Sensor Communication Circuit 3 High Voltage.
Common causes
Common causes include Damaged wiring or connectors in the sensor communication circuit, Faulty sensor, Malfunctioning ECM/PCM.
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 11, 2024
💬 Need more help? Ask Auto Expert for instant answers — it's free!
AutoCodes App

Fix Your Car Smarter

Try the New AutoCodes App!

Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.

AutoCodes App on Google Play

Code P16E5 2018 GMC Sierra Description

The P16E5 diagnostic trouble code (DTC) specifically refers to an issue with the Sensor Communication Circuit 3 in a 2018 GMC Sierra. This code indicates that there is a high voltage condition detected in the circuit that is responsible for communicating sensor data to the vehicle's engine control module (ECM) or powertrain control module (PCM). The sensor communication circuit is crucial for transmitting important data from various sensors to the ECM/PCM, allowing it to make necessary adjustments to optimize engine performance, fuel efficiency, emissions, and overall vehicle operation.

OBDII Code P16E5 2018 GMC Sierra - Sensor Communication Circuit 3 High Voltage
P16E5 2018 GMC Sierra Code - Sensor Communication Circuit 3 High Voltage

Common Causes of P16E5 2018 GMC Sierra

  1. Damaged wiring or connectors in the sensor communication circuit
  2. Faulty sensor
  3. Malfunctioning ECM/PCM
  4. Corrosion or contamination in the sensor circuit
  5. Electrical issues such as a short circuit or voltage spike

Symptoms of P16E5 2018 GMC Sierra

  1. Decreased fuel efficiency
  2. Rough idling
  3. Poor acceleration
  4. Engine misfires
  5. Stalling

How to Fix P16E5 2018 GMC Sierra

  1. Diagnose the issue using a diagnostic scanner to pinpoint the exact cause of the high voltage condition in Sensor Communication Circuit 3.
  2. Inspect the wiring and connectors for any damage, corrosion, or loose connections. Repair or replace as needed.
  3. Test the sensor for proper functionality and replace if it is found to be faulty.
  4. Check the ECM/PCM for any malfunctions or software glitches. Update the software or replace the module if necessary.
  5. Clear the DTC and perform a test drive to ensure that the issue has been resolved and that the vehicle is operating correctly.

Cost to Fix P16E5 2018 GMC Sierra

The cost of repairing a Sensor Communication Circuit 3 High Voltage issue in a 2018 GMC Sierra can vary depending on the specific cause of the problem and the parts/labour required. On average, the repair cost for this type of issue can range from $150 to $500, including parts and labour. However, it is important to note that diagnostic time and labour rates at auto repair shops can vary based on factors such as location, vehicle make and model, and engine type. It is recommended to consult with a qualified mechanic or dealership for a more accurate estimate based on your specific circumstances.

Need more information about the P16E5 2018 GMC Sierra code?

Need more information on how to fix the P16E5 2018 GMC Sierra code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P16E5 2018 GMC Sierra code diagnosed by a professional: Find a repair shop in your area

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 2018 GMC Sierra Code

1. What are the common symptoms of OBDII code P16E5 in a 2018 GMC Sierra?

- Common symptoms include rough engine idle, decreased fuel efficiency, and potential issues with vehicle acceleration.

2. What does the OBDII code P16E5 "Sensor Communication Circuit 3 High Voltage" indicate in a 2018 GMC Sierra?

- This code indicates a high voltage reading in the communication circuit of sensor 3 in the vehicle's system.

3. What are the possible causes of OBDII code P16E5 in a 2018 GMC Sierra?

- Possible causes include a faulty sensor, damaged wiring or connectors, a malfunctioning ECM, or issues with the sensor circuit.

4. How can I diagnose the issue related to OBDII code P16E5 in my 2018 GMC Sierra?

- Diagnosing the problem involves checking the wiring and connectors associated with sensor 3, testing the sensor itself, and inspecting the ECM for any faults.

5. Can I continue driving my 2018 GMC Sierra with OBDII code P16E5 present?

- It is not recommended to continue driving with this code present, as it can lead to further damage to the vehicle's systems and potentially affect its performance.

6. How can I repair OBDII code P16E5 in my 2018 GMC Sierra?

- Repairing this code may involve replacing the faulty sensor, repairing damaged wiring or connectors, resetting the ECM, or addressing any other underlying issues causing the high voltage reading.

7. Is it possible to reset the OBDII code P16E5 in a 2018 GMC Sierra without fixing the underlying issue?

- While you can clear the code using an OBDII scanner, it is crucial to address the root cause of the problem to prevent the code from reoccurring.

8. Are there any DIY tips for troubleshooting OBDII code P16E5 in a 2018 GMC Sierra?

- DIY tips include visually inspecting the sensor and its connections, checking for any visible damage, and ensuring proper electrical connections.

9. How long does it typically take to repair OBDII code P16E5 in a 2018 GMC Sierra?

- The repair time can vary depending on the exact cause of the issue, but it usually takes a few hours to a day to diagnose and fix the problem.

10. Will fixing OBDII code P16E5 in my 2018 GMC Sierra improve the vehicle's overall performance?

- Yes, addressing this code can help restore the vehicle's performance, fuel efficiency, and overall drivability by ensuring proper sensor communication and voltage levels.

Discuss the causes and fixes for P16E5 2018 GMC Sierra OBDII Code

Submit a New Comment

Code P16E5 2018 GMC Sierra comments

No comments found for this page.