[SOLVED] P128C Code: Fixing Fuel Rail Temperature Sensor Signal Message Counter

The automobile fault code P128C indicates a problem with the Fuel Rail Temperature Sensor 1. This can cause the Engine Light to turn on or the Service Engine Soon Warning Light to illuminate.

To fix this issue, you should visually inspect the wiring harness and connectors for any damage. Look for broken, bent, pushed out, or corroded connector pins. The repair time for this fault code is estimated to be around 1.0 hour.

It is important to address this issue promptly to prevent further damage to the vehicle.

Repair Importance Level10.0 (Out of 10)
Estimated Repair TimeApproximately 1.0 hour
Repair Difficulty Level10.0 (Out of 10)

When the engine light is on or the service engine soon warning light is illuminated, it could be a sign of the p128c fault code.

  • The symptoms of the automobile fault code P128C include the Engine Light being ON or the Service Engine Soon Warning Light being illuminated.

The automobile fault code P128C can be caused by a faulty Fuel Rail Temperature Sensor 1, an open or shorted harness, or a poor electrical connection in the circuit.

  • The fault code P128C can be caused by the following: a faulty Fuel Rail Temperature Sensor 1, an open or shorted harness for the Fuel Rail Temperature Sensor 1, or a poor electrical connection in the circuit of the Fuel Rail Temperature Sensor 1.

To fix the automobile fault code p128c, start by visually inspecting the wiring harness, connectors, and components for any damage or corrosion.

  • To fix the automobile fault code P128C, you need to follow these steps: 1.
  • Check the possible causes mentioned above.
  • 2.
  • Visually inspect the wiring harness and connectors related to the fault code.
  • 3.
  • Look for any damaged components.
  • 4.
  • Check for broken, bent, pushed out, or corroded pins in the connectors.
  • 5.
  • Repairing this fault code is estimated to take approximately 1.0 hour.

The automobile fault code P128C can be diagnosed and fixed within an estimated repair time of 1.0 hour.

The cost of the repair will depend on the hourly rate charged by the auto repair shop, which typically ranges between $75 and $150 per hour.

The P128C fault code refers to the Fuel Rail Temperature Sensor 1 Signal Message Counter I.

This code indicates an issue with the fuel rail temperature sensor in your vehicle.

The fuel rail temperature sensor is responsible for transmitting fuel pressure and temperature information to the Engine Control Module (ECM) through a serial data circuit. The fuel rail temperature sensor has a microprocessor that allows it to provide four separate sensor outputs from just three wires. The ECM supplies the sensor with a 5V reference circuit, a low reference circuit, and an asynchronous signalserial data circuit.

The asynchronous signal means that communication only goes from the fuel rail pressure sensor to the ECM. When the ECM receives the serial data signal from the fuel rail temperature sensor, it decodes it into separate voltages. These voltages are then displayed on a scan tool as the voltage inputs from the Fuel Temperature Sensor, Fuel Rail Pressure Sensor, and Fuel Rail Pressure Sensor 2. If you are experiencing the P128C fault code, it means that there is an issue with the signal message counter I of the fuel rail temperature sensor.

This could be due to a faulty sensor, a wiring issue, or a problem with the ECM.

It is important to have this issue diagnosed and repaired by a qualified technician to ensure proper functioning of your vehicle’s fuel system.

What are the possible causes for the automobile fault code P128C?

If you see the engine light on or the service engine soon warning light, it could be due to the fault code P128C. This code is often caused by a faulty fuel rail temperature sensor 1, an open or shorted harness for the sensor, or a poor electrical connection in the sensor circuit. To fix this issue, you should visually inspect the wiring harness and connectors, checking for any damage or corrosion. Additionally, look out for broken, bent, pushed out, or corroded pins in the connectors.

How can I visually inspect the wiring harness and connectors to fix the P128C fault code?

If you’re dealing with the P128C fault code and your engine light is on, it’s time to take a closer look at the wiring harness and connectors. The most common cause of this code is a faulty Fuel Rail Temperature Sensor 1, but it could also be due to an open or shorted harness or a poor electrical connection. To fix the issue, visually inspect the wiring harness and connectors for any signs of damage. Check for broken, bent, pushed out, or corroded pins on the connectors. Don’t forget to check the “Possible Causes” listed above for a comprehensive solution.

What should I look for when checking for damaged components and connector’s pins to resolve the P128C fault code?

When resolving the P128C fault code, start by checking for damaged components and connector’s pins. Visually inspect the related wiring harness and connectors, looking for any signs of damage such as broken, bent, pushed out, or corroded pins. This can help identify if the issue lies with a faulty fuel rail temperature sensor or if there is a problem with the sensor’s circuit connection. By thoroughly examining these areas, you can pinpoint the cause of the fault code and proceed with the necessary fix.

p128c error fault code explained

If your engine light is on and you’re seeing the P128C fault code, it could be due to a faulty Fuel Rail Temperature Sensor 1 or issues with the sensor’s wiring.

To fix this, visually inspect the wiring harness and connectors for any damage. Check for broken, bent, pushed out, or corroded pins on the connectors.

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