Fuel Pressure Sensor B Circuit Low

Where it lives

For P018C, the circuit described runs through the sensor. The description of P018C reports a fault at the sensor.

Check these first

• A short to ground on the sensor B signal wire
• A failed fuel pressure sensor B
• Low fuel pressure from a weak pump or clogged filter
• Corrosion at the sensor B connector
• A faulty ECM input for sensor B

What to do next

1. Check the fuel pressure at the rail
2. Test the sensor B signal wire for a short to ground
3. Inspect the sensor B connector and wiring
4. Replace the fuel filter if pressure is low
5. Replace fuel pressure sensor B if it reads low
6. Clear the code and retest

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