Error code
OBD2 P0551
OBD2P0551
Diagnostic Trouble Code· Standard OBD-II fault code read from the vehicle's onboard diagnostics.
What it means
Power Steering Pressure Sensor/Switch Circuit Range/Performance.
Severity
moderateCan be driven, but may experience difficulty in steering at low speeds.
Summary
P0551 indicates an issue with the power steering pressure sensor/switch circuit, which monitors the hydraulic pressure in the power steering system.
Common Causes
- Faulty power steering pressure sensor
- Wiring or connector issues related to the PSP sensor
Fixes
- Replace the power steering pressure sensor.
Not affiliated with OBD2. Answer summarized from the manufacturer's manual linked above; consult that source for the authoritative procedure.
More OBD2 codes
- P0500Vehicle Speed Sensor 'A'
- P0501Vehicle Speed Sensor 'A' Range/Performance
- P0502Vehicle Speed Sensor 'A' Circuit Low Input
- P0503Vehicle Speed Sensor 'A' Intermittent/Erratic/High
- P0504Brake Switch 'A'/'B' Correlation
- P0505Idle Air Control System
- P0506Idle Air Control System RPM Lower Than Expected
- P0507Idle Air Control System RPM Higher Than Expected
- P0508Idle Air Control System Circuit Low
- P0509Idle Air Control System Circuit High
- P0510Closed Throttle Position Switch
- P0511Idle Air Control Circuit