P055F: Engine Oil Pressure Out of Range
Standardized SAE J2012 code · P05xx — Vehicle speed, idle control and auxiliary inputs
What does P055F mean?
P055F is a condition code: the measured oil pressure is above the maximum expected for speed and oil temperature – Ford, which documents it, calls it 'too high' and pairs it with P0524 (too low). Ford checks continuously for 5 s, only with plausible oil pressure, oil temperature and coolant sensors, as engine protection. Background are regulated oil pumps, whose control valve (P06DA ff) defaults to full pressure on failure. An electrically high signal is P0523 or P055D instead.
The code tells you which monitor failed, not which part is broken. Test before replacing parts.
Symptoms
- Check engine light or oil pressure warning
- Possible engine protection or power limit
- Possible oil filter or seal leaks
Common causes
- High Oil pump control valve or variable pump stuck at high pressure
- Medium Pump relief valve stuck
- Medium Wrong viscosity, very cold oil
- Low Sensor A reading high within range
Likelihood is a general estimate across vehicles; your make and model may differ.
Add your car to see reports of P055F on the same make and model first.
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