What are the common causes of P018B?

A fuel pressure sensor B out of calibration. Resistance in the sensor B wiring. A clogged fuel filter skewing pressure. A weak fuel pump. An ECM calibration mismatch.

Compare commanded and actual fuel pressure. Inspect the sensor B wiring and connector. Replace the fuel filter if pressure is short. Test the fuel pump delivery. Replace fuel pressure sensor B if it reads off. Clear the code and retest.

P018B

Fuel Pressure Sensor B Circuit Range/Performance

System: Fuel and air metering (P code)
Lamp: Check Engine Light
Category: Powertrain - Fuel/Air Metering

What it means

P018B means Fuel Pressure Sensor B Circuit Range/Performance.

Where it lives

For P018B, start at the sensor the description names.

Check these first

A fuel pressure sensor B out of calibration
Resistance in the sensor B wiring
A clogged fuel filter skewing pressure
A weak fuel pump
An ECM calibration mismatch

What to do next

Compare commanded and actual fuel pressure
Inspect the sensor B wiring and connector
Replace the fuel filter if pressure is short
Test the fuel pump delivery
Replace fuel pressure sensor B if it reads off
Clear the code and retest

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Updated

Generic SAE J2012 definition. Last updated 2026-10-10.