P0550: Power Steering Pressure Sensor Circuit Malfunction
Can you still drive? Yes, but the engine may stall during tight turns or parking. Be prepared to restart and avoid situations requiring heavy steering input until repaired.
What Does P0550 Mean?
Code P0550 indicates a fault in the power steering pressure sensor circuit. The PCM uses this sensor to detect increased engine load from power steering operation and adjusts idle speed accordingly. A malfunctioning sensor can cause the engine to stall during parking maneuvers or low-speed turns.
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
- Faulty power steering pressure sensor
- Damaged wiring or connector at the sensor
- Low power steering fluid level
- Failed power steering pump creating abnormal pressures
- Corroded connector pins
Symptoms
- Check engine light on
- Engine stalling when turning the steering wheel at low speed
- Idle speed drops when steering
- Poor idle quality during parking maneuvers
Diagnostic Steps
- 1Check power steering fluid level and condition
- 2Inspect sensor wiring and connector for damage
- 3Measure sensor reference voltage and ground at connector
- 4Monitor sensor output with a scan tool while turning the wheel
- 5Test sensor resistance against specifications
Recommended Parts & Tools
power steering pressure sensor
power steering fluid
Estimated Repair Cost
| Type | Estimated Cost |
|---|---|
| Total Repair Cost Range | $50 - $350 |
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Chat with AI About P0550Commonly Affected Vehicles
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Frequently Asked Questions
Why does my car stall when I turn the wheel with P0550?
The PCM cannot detect the increased engine load from power steering and fails to raise the idle speed to compensate, causing the engine to stall.
Where is the power steering pressure sensor located?
It is typically located on the power steering high-pressure line near the steering rack or gear. Consult your vehicle service manual for the exact location.
Community Fix Reports
Community reports are user-submitted and not verified by Auto AI Buddy. Results may vary.
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