AutoCodes – Chevrolet – P127D 2014 Chevrolet Silverado

P127D 2014 Chevrolet Silverado Code - Fuel Rail Pressure Sensor 2 Circuit 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 Sensor 2, Fuel Rail Pressure Sensor 2 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
P127D 2014 Chevrolet Silverado indicates Fuel Rail Pressure Sensor 2 Circuit High Voltage.
Common causes
Common causes include Low or no fuel, Faulty Fuel Rail Pressure Sensor 2, Fuel Rail Pressure Sensor 2 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.
AI answers can be wrong. Verify repairs with testing. Open full chat
Code Popularity 519
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on May 30, 2022
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Code P127D 2014 Chevrolet Silverado 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 2 signal is greater than a predefined threshold for greater than 1s.
OBDII Code P127D 2014 Chevrolet Silverado - Fuel Rail Pressure Sensor 2 Circuit High Voltage - AutoCodes.com
P127D 2014 Chevrolet Silverado Code - Fuel Rail Pressure Sensor 2 Circuit High Voltage

What are the Possible Causes of the DTC P127D 2014 Chevrolet Silverado?

  • Low or no fuel
  • Faulty Fuel Rail Pressure Sensor 2
  • Fuel Rail Pressure Sensor 2 harness is open or shorted
  • Fuel Rail Pressure Sensor 2 circuit poor electrical connection
  • Faulty Fuel Pump

How to Fix the DTC P127D 2014 Chevrolet Silverado?

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 P127D 2014 Chevrolet Silverado 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 P127D 2014 Chevrolet Silverado code?

Need more information on how to fix the P127D 2014 Chevrolet Silverado code? Get Access to Factory Service Manuals

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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 P127D 2014 Chevrolet Silverado Code

1. What are the common symptoms of OBDII code P127D in a 2014 Chevrolet Silverado?

Symptoms may include rough idling, decreased fuel efficiency, engine misfires, and potentially a Check Engine light.

2. What causes the Fuel Rail Pressure Sensor 2 Circuit High Voltage fault code (P127D) in a 2014 Chevrolet Silverado?

Common causes include a faulty fuel rail pressure sensor, wiring issues, a malfunctioning fuel pump, or problems with the fuel pressure regulator.

3. How serious is the P127D OBDII code in a 2014 Chevrolet Silverado?

While the vehicle may still be operable with this code present, it is important to address the issue promptly to prevent potential damage to the engine or fuel system.

4. Can I continue driving my 2014 Chevrolet Silverado with the P127D code?

It is not recommended to drive the vehicle extensively with this code present, as it can lead to reduced performance and potential long-term damage if left unresolved.

5. How can I diagnose the cause of the P127D code in my 2014 Chevrolet Silverado?

Diagnosing the issue may involve using an OBDII scanner to retrieve the specific fault code, inspecting the fuel rail pressure sensor and associated wiring, and conducting a fuel pressure test.

6. Are there any DIY repair tips for fixing the P127D code in a 2014 Chevrolet Silverado?

DIY repair tips may include checking and cleaning the fuel rail pressure sensor connector, inspecting for damaged wires, and ensuring proper fuel pressure levels.

7. How much does it typically cost to repair the P127D code in a 2014 Chevrolet Silverado?

Costs can vary depending on the exact cause of the issue, but repairs for this code may range from $200 to $600, including parts and labor.

8. Can resetting the OBDII code P127D in a 2014 Chevrolet Silverado fix the issue temporarily?

Resetting the code may temporarily turn off the Check Engine light, but it will not resolve the underlying problem causing the fault code to appear.

9. Will the P127D code affect the overall performance of my 2014 Chevrolet Silverado?

Yes, the presence of this code can impact the vehicle's performance, leading to issues such as reduced power, rough idling, and poor fuel efficiency.

10. Is it safe to ignore the P127D OBDII code in a 2014 Chevrolet Silverado?

Ignoring the code is not recommended, as it can potentially lead to more severe engine or fuel system problems if left unresolved.

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