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AutoCodes - Generic - P127C

P127C Code - Fuel Rail Pressure Sensor 2 Circuit Low Voltage

- Code Popularity: 12,346 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
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What are the Possible Causes of the DTC P127C?

NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.
  • 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
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How to Fix the DTC P127C?

Review the 'Possible Causes' mentioned above and visually examine the corresponding wiring harness and connectors. Ensure to check for any damaged components and inspect the connector pins for signs of being broken, bent, pushed out, or corroded.

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What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P127C code, it typically requires 1.0 hour of labor. The specific diagnosis time and labor rates at auto repair shops can differ based on factors such as the location, make and model of the vehicle, and even the engine type. It is common for most auto repair shops to charge between $75 and $150 per hour.

What are Code Possible Symptoms?

  • Engine Light ON (or Service Engine Soon Warning Light)

Code P127C 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 difference between the following parameters is more significant than a predefined value of the Fuel Rail Pressure Sensor 1 & Fuel Rail Pressure Sensor 2 for greater than 2.6 s.

OBDII Code P127C - Fuel Rail Pressure Sensor 2 Circuit Low Voltage - AutoCodes.com
P127C Code - Fuel Rail Pressure Sensor 2 Circuit Low Voltage

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