AutoCodes – GMC – P16E5 2014 GMC Sierra

P16E5 2014 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 2014 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.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 164

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
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code P16E5 2014 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 2014 GMC Sierra - Sensor Communication Circuit 3 High Voltage - AutoCodes.com — P16E5 2014 GMC Sierra Code - Sensor Communication Circuit 3 High Voltage

What does this mean?

What are the Possible Causes of the DTC P16E5 2014 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 2014 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 2014 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 2014 GMC Sierra code?

Need more information on how to fix the P16E5 2014 GMC Sierra code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P16E5 2014 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 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.