P0550
Power Steering Pressure Sensor Circuit
General electrical fault on the power steering pressure sensor. The ECU uses this signal to compensate idle speed when the steering load increases; without it idle stability can suffer during parking maneuvers.
- Check engine light: Yes
- Emissions related: No
- Repair difficulty: medium
Common causes
Ordered by how often each turns out to be the cause.
- Pressure sensor failedCommon
- Wiring or connector faultPossible
Parts involved
- Power Steering Pressure Sensor
- Ps Sensor Wiring
P0550 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.