P127C 2016 GMC Sierra Code - Fuel Rail Pressure Sensor 2 Circuit 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 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
- P127C 2016 GMC Sierra indicates Fuel Rail Pressure Sensor 2 Circuit Low 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.
Code P127C 2016 GMC Sierra Description
What are the Possible Causes of the DTC P127C 2016 GMC Sierra?
- 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 P127C 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 P127C 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 P127C 2016 GMC Sierra code?
Need more information on how to fix the P127C 2016 GMC Sierra code? Get Access to Factory Service Manuals
Need Help with the Code?
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Frequently Asked Questions about P127C 2016 GMC Sierra Code
1. What are common symptoms of OBDII code P127C (Fuel Rail Pressure Sensor 2 Circuit Low Voltage) in a 2016 GMC Sierra?
- Common symptoms include poor engine performance, rough idling, decreased fuel efficiency, and potential stalling.
2. What are the possible causes of code P127C in a 2016 GMC Sierra?
- The code P127C can be triggered by issues such as a faulty fuel rail pressure sensor, wiring issues, low fuel pressure, or a problem with the fuel pump.
3. How can I diagnose the cause of OBDII code P127C in my 2016 GMC Sierra?
- To diagnose the issue, you can perform a visual inspection of the sensor and its wiring, test the fuel rail pressure sensor, check fuel pressure levels, and scan for any related codes.
4. Can a dirty fuel filter cause OBDII code P127C in a 2016 GMC Sierra?
- Yes, a dirty fuel filter can restrict fuel flow and lead to low fuel pressure, triggering the P127C code. It is recommended to check and replace the fuel filter if necessary.
5. Is it safe to continue driving my 2016 GMC Sierra with OBDII code P127C present?
- It is not recommended to continue driving with the code present, as it can lead to further damage to the engine and potentially result in more severe issues.
6. How can I reset the OBDII code P127C in my 2016 GMC Sierra?
- You can reset the code using an OBDII scanner or by disconnecting the vehicle's battery for a few minutes. However, it is important to address the underlying issue causing the code to prevent it from reoccurring.
7. Can a DIY enthusiast repair OBDII code P127C in a 2016 GMC Sierra?
- Depending on the root cause, DIY enthusiasts may be able to address some issues related to the P127C code, such as checking and replacing the fuel rail pressure sensor or addressing wiring problems. For complex issues, professional help may be required.
8. How much does it typically cost to repair OBDII code P127C in a 2016 GMC Sierra?
- The cost of repairing the P127C code can vary based on the underlying cause. Simple fixes such as sensor replacement or wiring repair may cost a few hundred dollars, while more complex issues could be more expensive.
9. Can a bad fuel pump trigger OBDII code P127C in a 2016 GMC Sierra?
- Yes, a failing fuel pump can lead to low fuel pressure, which may trigger the P127C code. It is advisable to have the fuel pump inspected if the code persists after addressing other possible causes.
10. How often should I check the fuel system components to prevent OBDII code P127C in my 2016 GMC Sierra?
- Regular maintenance checks, including inspecting the fuel rail pressure sensor, fuel filter, and fuel pump, can help prevent issues that may trigger the P127C code. It is recommended to follow the manufacturer's maintenance schedule.
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