AutoCodes – GMC – P16E5 2017 GMC Sierra

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

Quick Answer

The Engine Control Module (ECM) uses the Fuel Rail Pressure (FRP) sensor to constantly adjust the high-pressure fuel pump's feed rate so that the ideal pressure is permanently maintained in the high-pressure section (between the high-pressure fuel pump and the injectors) by means of closed-loop control. Common causes include Low or no fuel, Faulty Fuel Rail Pressure (FRP) Sensor, Fuel Rail Pressure harness is open or shorted. 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 Low or no fuel, Faulty Fuel Rail Pressure (FRP) Sensor, Fuel Rail Pressure harness is open or shorted.
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 310

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 May 30, 2022

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P16E5 2017 GMC Sierra Description

The Engine Control Module (ECM) uses the Fuel Rail Pressure (FRP) sensor to constantly adjust the high-pressure fuel pump's feed rate so that the ideal pressure is permanently maintained in the high-pressure section (between the high-pressure fuel pump and the injectors) by means of closed-loop control. The fuel rail pressure sensor transmits fuel pressure and temperature information via serial data to the ECM. When the fuel pressure is high, the signal voltage is high. When the fuel pressure is low, the signal voltage is low. The ECM controls the fuel pressure regulator, which regulates high-pressure fuel that goes to the fuel injector rails and the injectors. The Diagnostic Trouble Code (DTC) will be set if the Fuel Rail Pressure Sensor Signal is greater than a predefined threshold for greater than 2.6 s.

OBDII Code P16E5 2017 GMC Sierra - Sensor Communication Circuit 3 High Voltage - AutoCodes.com — P16E5 2017 GMC Sierra Code - Sensor Communication Circuit 3 High Voltage

What does this mean?

What are the Possible Causes of the DTC P16E5 2017 GMC Sierra?

Low or no fuel
Faulty Fuel Rail Pressure (FRP) Sensor
Fuel Rail Pressure harness is open or shorted
Fuel Rail Pressure circuit poor electrical connection
Faulty Fuel Pump

How to Fix the DTC P16E5 2017 GMC Sierra?

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 P16E5 2017 GMC Sierra 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.

Need more information about the P16E5 2017 GMC Sierra code?

Need more information on how to fix the P16E5 2017 GMC Sierra code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P16E5 2017 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 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.