P0551
Power Steering Pressure Sensor Range/Performance
The PS pressure sensor signal stays in electrical range but is implausible for the operating state, e.g. high pressure reported with the wheels straight.
- Check engine light: Yes
- Emissions related: No
- Repair difficulty: medium
Common causes
Ordered by how often each turns out to be the cause.
- Sensor drift or contaminationCommon
- Sensor element aged beyond calibration windowLess likely
- Sensor mounting loose - signal dampingLess likely
Parts involved
- Power Steering Pressure Sensor
P0551 is a generic OBD-II code defined by SAE J2012. Exact wording and diagnostic procedure vary by manufacturer and model. Code definitions are drawn from the public-domain OBDex dataset; the workshop notes are our own.