P1003 – Fuel Pressure Deviation Detected (Ford)

Description

P1003 Ford indicates that the PCM detected fuel pressure outside the expected range. This can cause hesitation, stalling, and poor acceleration under load.

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Symptoms

Hard starting
Hesitation
Poor acceleration
Stalling under load

Causes

Weak fuel pump
Clogged filter
Faulty pressure regulator
Fuel pressure sensor fault

Diagnosis

Measure fuel pressure
Compare to specifications
Check sensor signal

Repair

Replace pump or filter
Repair leaks
Replace pressure regulator or sensor