AutoCodes – Chevrolet – P127D Chevrolet

P127D Chevrolet 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 Chevrolet 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.

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Code Popularity 1,358

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 P127D Chevrolet 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 Chevrolet - Fuel Rail Pressure Sensor 2 Circuit High Voltage - AutoCodes.com — P127D Chevrolet Code - Fuel Rail Pressure Sensor 2 Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P127D Chevrolet?

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 Chevrolet?

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 Chevrolet 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 Chevrolet code?

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

Need Help with the Code?

Get the P127D Chevrolet code diagnosed by a professional: Find a repair shop in your area

Information for Specific Chevrolet Models

P127D 2014 Chevrolet Silverado — Fuel Rail Pressure Sensor 2 Circuit High Voltage
P127D 2015 Chevrolet Silverado — Fuel Rail Pressure Sensor 2 Circuit High Voltage
P127D 2016 Chevrolet Silverado — Fuel Rail Pressure Sensor 2 Circuit High Voltage
P127D 2017 Chevrolet Silverado — Fuel Rail Pressure Sensor 2 Circuit High Voltage
P127D 2018 Chevrolet Silverado — Fuel Rail Pressure Sensor 2 Circuit High Voltage

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 Chevrolet Code

1. What are the common symptoms of OBDII code P127D in a Chevrolet related to the Fuel Rail Pressure Sensor 2 Circuit High Voltage issue?

Symptoms may include rough idling, reduced engine performance, poor fuel economy, and potentially a check engine light.

2. What are some possible causes of OBDII code P127D in a Chevrolet indicating a high voltage issue with Fuel Rail Pressure Sensor 2 Circuit?

Potential causes may include a faulty fuel rail pressure sensor, issues with the sensor wiring or connectors, or problems with the vehicle's fuel system.

3. How serious is OBDII code P127D in a Chevrolet, specifically pointing to Fuel Rail Pressure Sensor 2 Circuit High Voltage?

While the vehicle may still be drivable with this code, it is important to address it promptly to prevent potential damage to the engine and ensure optimal performance.

4. How can I diagnose and repair OBDII code P127D in a Chevrolet related to the high voltage issue with Fuel Rail Pressure Sensor 2 Circuit?

Diagnosis typically involves inspecting the sensor, checking wiring connections, and testing the fuel system components. Repair may involve replacing the sensor, repairing wiring issues, or addressing fuel system problems.

5. Can a DIY enthusiast fix OBDII code P127D indicating a high voltage problem with Fuel Rail Pressure Sensor 2 Circuit in a Chevrolet?

While some experienced DIYers may be able to diagnose and address this code, it is recommended to consult a professional mechanic, especially for complex electrical or fuel system repairs.

6. Are there any temporary solutions for OBDII code P127D in a Chevrolet related to the Fuel Rail Pressure Sensor 2 Circuit High Voltage issue?

There are usually no recommended temporary fixes for this code, as addressing the root cause promptly is essential for the vehicle's performance and longevity.

7. How much does it typically cost to repair OBDII code P127D in a Chevrolet indicating a high voltage issue with Fuel Rail Pressure Sensor 2 Circuit?

Costs can vary depending on the specific cause of the issue, but repairs for this code may range from a few hundred to over a thousand dollars, including parts and labor.

8. Can driving with OBDII code P127D indicating a high voltage problem with Fuel Rail Pressure Sensor 2 Circuit damage the vehicle further?

Continued driving with this code may potentially lead to decreased fuel efficiency and engine performance, and in some cases, it could cause further damage to the engine or fuel system components.

9. How long can I safely drive with OBDII code P127D in a Chevrolet pointing to the Fuel Rail Pressure Sensor 2 Circuit High Voltage issue?

It is best to address this code as soon as possible to prevent any potential issues from worsening. Continuing to drive with this code without addressing it promptly is not recommended.

10. Can weather conditions or driving habits contribute to triggering OBDII code P127D in a Chevrolet related to the high voltage issue with Fuel Rail Pressure Sensor 2 Circuit?

While extreme weather conditions or aggressive driving habits may not directly cause this code, they could potentially exacerbate existing issues with the fuel system or sensor, leading to the code being triggered.