P0551: Power Steering Pressure Sensor Circuit Range/Performance
Can you still drive? Yes, this is a minor issue. You may notice slight idle fluctuations during steering. Drive normally and schedule a repair at your convenience.
What Does P0551 Mean?
Code P0551 indicates that the power steering pressure sensor is sending signals outside the expected range for current operating conditions. The sensor may be responding, but its readings do not correlate with actual steering input. This can cause inconsistent idle speed compensation during steering maneuvers.
Need to read your codes?
An OBD-II scanner lets you read and clear diagnostic trouble codes from your vehicle's computer. Most scanners work with any car made after 1996.
Browse OBD-II Scanners on AmazonCommon Causes
- Degraded power steering pressure sensor
- Intermittent wiring connection at sensor
- Air in power steering system
- Worn power steering pump causing erratic pressure
- Contaminated power steering fluid
Symptoms
- Check engine light on
- Intermittent idle dip when steering
- Slightly rough idle during turns
- Idle speed fluctuation when parking
Diagnostic Steps
- 1Monitor sensor output with a scan tool while turning the steering wheel lock to lock
- 2Compare sensor readings to expected values in service data
- 3Check for air in the power steering system and bleed if necessary
- 4Inspect power steering fluid condition
- 5Test wiring for intermittent faults with a wiggle test
Recommended Parts & Tools
power steering pressure sensor
power steering fluid
Estimated Repair Cost
| Type | Estimated Cost |
|---|---|
| Total Repair Cost Range | $40 - $300 |
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Frequently Asked Questions
Is P0551 serious?
No, P0551 is a low severity code. It may cause slight idle instability during steering but does not affect safety or driveability significantly.
Can air in the power steering system cause P0551?
Yes, air in the system creates erratic pressure spikes that cause out-of-range sensor readings. Bleeding the power steering system may resolve the issue.
Community Fix Reports
Community reports are user-submitted and not verified by Auto AI Buddy. Results may vary.
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