P2540: Low-pressure fuel performance after running dry or filter service

Recent service can explain the timing

The case describes extended cranking after the vehicle runs low on fuel, after fuel-filter work or on newly delivered vehicles. P2540 may accompany the complaint. Stellantis identifies trapped air in the filter housing as a possible cause, so the sequence of events is useful evidence before assuming the low-pressure sensor itself has failed.

The improvement may be gradual

The documented procedure aims to remove trapped air and shorten cranking. The note cautions that some residual air may take additional vehicle operation to leave the system. That is not a reason to ignore severe or worsening symptoms; it explains why the technician should compare the result with the original condition and distinguish improvement from a completely unchanged fault.

Use the correct fuel-system procedure

The publication warns that opening a door or operating the brake can initiate an in-tank priming cycle during service. Professional isolation and the correct filter-housing procedure are therefore essential; this summary is not an owner instruction to open fuel lines or manually fill components. Confirm that the actual vehicle uses the documented arrangement, since the PDF does not establish every compatible model. Retain the service history, filter installation findings and post-procedure starting behavior. If the fault persists without the expected improvement, investigate the measured low-pressure system under current guidance rather than repeatedly replacing filters or clearing P2540.

Source and applicability

Stellantis STAR S2514000002, released May 2025, describes a dual-filter-housing case. The PDF does not supply a complete model/engine application table.

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