What is SPN 5246 FMI 19:
SPN 5246 FMI 19 indicates a low voltage condition in the Fuel Pressure Sensor Circuit. FMI 19 suggests that the voltage reading from the fuel pressure sensor is below the expected threshold, which could affect fuel injection timing, leading to engine performance issues.
Why This Happens:
- Faulty fuel pressure sensor.
- Damaged or shorted wiring in the sensor circuit.
- Loose or corroded sensor connectors.
- Low fuel pressure due to a malfunctioning fuel pump.
- ECM misinterpretation of the sensor's signal.
How to Fix It:
- Inspect the fuel pressure sensor and wiring for visible damage.
- Test the voltage and resistance from the fuel pressure sensor to ensure it is within specifications.
- Clean or replace the sensor connectors if corroded or loose.
- Replace the faulty fuel pressure sensor if necessary.
- Ensure the fuel pump is working properly and providing the correct fuel pressure.
How to Avoid It Before It Happens:
- Regularly inspect the fuel pressure sensor and wiring.
- Keep connectors clean and free from corrosion.
- Maintain proper fuel pressure by inspecting the fuel system.
- Replace fuel filters as recommended to ensure smooth fuel flow.
- Clue offers proactive Fuel Management services to monitor fuel systems and identify issues before they lead to engine performance problems.
