System: Powertrain (P-Code)
SAE Standard (Generic)
Family: Engine Oil Pressure Low
Code P055F: Engine Oil Pressure Out of Range
Diagnostic & Technical Explanation
Code P055F (Engine Oil Pressure Out of Range) sets when the ECM sees actual oil pressure (as opposed to just the sensor signal) fall outside the expected range for current RPM and temperature, indicating a real lubrication problem rather than a sensor fault. Common causes are a low oil level, the wrong oil viscosity, a worn oil pump or pressure regulator valve, or a clogged oil pickup screen/filter.
First-listed procedure
Rank #1
Check and correct engine oil level and condition
Easy DIY
This is the first procedure in the authored
consideration order, not a measured cause likelihood. Execute it only when its prerequisites
and diagnostic findings support it. Its cost and labor estimates (where known), the step-by-step procedure and the
remaining 3 procedure(s) are in the licensed dataset. Ordering context.
Full family: Engine Oil Pressure Low
What this page does not show
This page publishes the fault mechanism and the code index. The licensed dataset adds, for
every one of the 15,886 codes, the full authored repair set (56,729 procedures in total)
with the fields deliberately withheld here:
- Procedures 2..n after the first-listed procedure
- Aftermarket parts cost ranges in USD (
est_parts_cost_min/max_usd)
- Professional labor-hour estimates (
est_labor_hours)
- Step-by-step diagnostic and repair instructions
- Replacement-part mappings and catalog lookups
- 6,637 manufacturer-specific OEM codes across 32 makes ($149 tier)