Power Steering Pressure Sensor Circuit Low Input
The P0552 code indicates that the Power Steering Pressure (PSP) sensor circuit is reporting a voltage lower than the manufacturer's specified range. The PSP sensor monitors hydraulic pressure in the power steering system and sends a signal to the Engine Control Module (ECM) to adjust idle speed during steering maneuvers. A low input can cause the ECM to fail to compensate for increased engine load, leading to stalling or rough idle when turning the steering wheel.
1. Most Common Causes
- Faulty power steering pressure sensor
- Open or shorted circuit in the sensor wiring or connector
- Low power steering fluid level or contaminated fluid
- Failed power steering pump causing low pressure
2. Symptoms You Will Notice
- Engine stalling or rough idle when turning the steering wheel
- Hard steering or increased steering effort
- Check Engine Light illuminated
- Erratic idle speed
3. Step-by-Step Diagnosis
Step 1: Use an OBD2 scanner to confirm the code and check for additional codes.
Step 2: Inspect the power steering fluid level and condition; top off or replace if necessary.
Step 3: Visually check the PSP sensor wiring and connector for damage, corrosion, or loose connections.
Step 4: Test the PSP sensor voltage with a multimeter; compare to manufacturer specifications.
Step 5: If sensor and wiring are okay, test the power steering pump pressure to rule out mechanical failure.
4. Frequently Asked Questions
Is it safe to drive with this code?▼
It is not recommended to drive with this code, as it can cause engine stalling, especially during low-speed maneuvers, which poses a safety risk.
How much does it cost to fix?▼
The cost to fix P0552 typically ranges from $50 to $150, including parts and labor, depending on whether the sensor or wiring needs replacement.
5. Commonly Affected Makes
This is a generic OBD2 code, potentially applicable to any manufacturer using this diagnostic standard.