AutoCodes – GMC – P16E4 2016 GMC Sierra

P16E4 2016 GMC Sierra Code - Sensor Communication Circuit 3 Low 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: P16E4 2016 GMC Sierra indicates Sensor Communication Circuit 3 Low 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 168

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 P16E4 2016 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 less than a predefined threshold for greater than 2.6 s.

OBDII Code P16E4 2016 GMC Sierra - Sensor Communication Circuit 3 Low Voltage - AutoCodes.com — P16E4 2016 GMC Sierra Code - Sensor Communication Circuit 3 Low Voltage

What does this mean?

What are the Possible Causes of the DTC P16E4 2016 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 P16E4 2016 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 P16E4 2016 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 P16E4 2016 GMC Sierra code?

Need more information on how to fix the P16E4 2016 GMC Sierra code? Get Access to Factory Service Manuals

Need Help with the Code?

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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 P16E4 2016 GMC Sierra Code

1. What are the common symptoms of OBDII code P16E4 in a 2016 GMC Sierra?

- Common symptoms include poor engine performance, rough idling, stalling, reduced fuel efficiency, and illuminated Check Engine Light.

2. What does the OBDII code P16E4 "Sensor Communication Circuit 3 Low Voltage" mean for a 2016 GMC Sierra?

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

3. What are the possible causes of OBDII code P16E4 in a 2016 GMC Sierra?

- Potential causes include damaged wiring or connectors, a faulty sensor, a malfunctioning control module, or a low voltage issue in the circuit.

4. How can I diagnose the OBDII code P16E4 in my 2016 GMC Sierra?

- Diagnosis involves using a scan tool to read the code, checking the related wiring and connectors for damage, testing the sensor's functionality, and verifying the voltage levels in the circuit.

5. Can I still drive my 2016 GMC Sierra with the OBDII code P16E4 present?

- It is not recommended to drive the vehicle with this code unresolved, as it can lead to further damage and potential safety issues.

6. Is it possible to reset the OBDII code P16E4 in a 2016 GMC Sierra?

- Resetting the code without addressing the underlying issue will only temporarily clear the Check Engine Light. The root cause of the problem must be identified and fixed.

7. How much does it typically cost to repair OBDII code P16E4 in a 2016 GMC Sierra?

- The cost of repairs can vary depending on the specific cause of the code. It may involve simple fixes like replacing a sensor or more complex issues requiring professional diagnosis and repair.

8. Can I repair OBDII code P16E4 in my 2016 GMC Sierra myself?

- If you have experience working on automotive electronics and diagnostics, you may be able to address simpler causes like damaged wiring or connectors. Complex issues may require professional assistance.

9. Are there any preventive measures to avoid OBDII code P16E4 in a 2016 GMC Sierra?

- Regular vehicle maintenance, including checking and maintaining wiring integrity, can help prevent issues leading to this code. Promptly addressing related warning signs can also prevent further damage.

10. How long does it take to repair OBDII code P16E4 in a 2016 GMC Sierra?

- The repair time can vary depending on the cause of the code and the complexity of the fix. Simple repairs may take a few hours, while more involved issues could require a day or more.