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 PCM. A low input can result from a faulty sensor, wiring issues, or low power steering fluid. This condition may cause the PCM to adjust idle speed incorrectly, leading to drivability concerns.
01. Most Common Causes
- Faulty power steering pressure sensor
- Open or shorted wiring in the sensor circuit
- Poor electrical connection at the sensor
- Low power steering fluid level
02. Symptoms You Will Notice
- Illuminated Check Engine Light
- Hard steering or increased steering effort
- Engine stalling or rough idle when turning
- Erratic power steering assist
03. Step-by-Step Diagnosis
Step 1: Scan for codes and record freeze frame data.
Step 2: Inspect power steering fluid level and condition; top off if low.
Step 3: Visually check the PSP sensor connector and wiring for damage or corrosion.
Step 4: Test the PSP sensor signal voltage with a multimeter; compare to specs.
Step 5: If sensor is faulty, replace it; if wiring issue, repair as needed.
04. Commonly Affected Makes
05. Frequently Asked Questions
Is it safe to drive with this code?▼
It is not recommended to drive with P0552 as it can cause hard steering and potential loss of power steering assist, increasing accident risk.
How much does it cost to fix?▼
The typical repair cost ranges from $50 to $150, including parts (sensor) and labor.