Low Pressure Fuel System Sensor Circuit Range/Performance

Where it lives

For P2540, the description names the sensor as the part involved.

Check these first

• A low pressure fuel system sensor reading outside its range
• A restriction in the low pressure fuel supply
• High resistance in the low pressure fuel system sensor circuit
• A failing low pressure fuel system sensor

What to do next

1. Read the low pressure fuel system sensor on a scan tool
2. Compare the sensor reading to the measured fuel pressure
3. Check the low pressure fuel supply for restriction
4. Test the low pressure fuel system sensor circuit for added resistance
5. Replace the low pressure fuel system sensor if the supply tests good
6. Clear the code and retest

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