P16E4 2014 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 2014 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.
Code P16E4 2014 GMC Sierra Description
What are the Possible Causes of the DTC P16E4 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 P16E4 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 P16E4 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.
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Frequently Asked Questions about P16E4 2014 GMC Sierra Code
1. What does the OBDII code P16E4 mean on a 2014 GMC Sierra?
The code P16E4 indicates a "Sensor Communication Circuit 3 Low Voltage" issue, meaning the circuit is not receiving the expected voltage from a specific sensor.
2. What are the symptoms of code P16E4 on a 2014 GMC Sierra?
Common symptoms include a check engine light, reduced engine performance, erratic transmission behavior, or difficulty starting the vehicle.
3. What causes the P16E4 code on a 2014 GMC Sierra?
Possible causes include a faulty sensor, damaged wiring, a poor electrical connection, or a malfunctioning engine control module (ECM).
4. How do I diagnose the P16E4 code on my GMC Sierra?
Start by using a scan tool to confirm the code, then inspect the wiring and connectors for damage or corrosion. Test the sensor for proper operation and check for voltage at the circuit.
5. Can I drive my 2014 GMC Sierra with the P16E4 code?
Driving with this code is not recommended, as it may lead to reduced performance or further damage to the vehicle's systems.
6. How do I fix the P16E4 code on a GMC Sierra?
Repairs may include replacing the faulty sensor, repairing or replacing damaged wiring, cleaning corroded connectors, or reprogramming or replacing the ECM if necessary.
7. What sensor is typically associated with the P16E4 code on a 2014 GMC Sierra?
The specific sensor depends on the vehicle configuration but may include components like a throttle position sensor or a transmission sensor.
8. What tools are needed to repair the P16E4 code?
You’ll typically need a scan tool, multimeter, wiring diagrams, and basic hand tools for inspection and repairs.
9. Is the P16E4 code covered under warranty for a 2014 GMC Sierra?
It depends on the vehicle's warranty status and terms. Check with your dealership or refer to your warranty documentation.
10. Can a loose connector cause the P16E4 code on my GMC Sierra?
Yes, a loose or corroded connector can disrupt voltage flow and trigger the P16E4 code. Inspect all connections in the affected circuit.
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