The P0552: Power Steering Pressure Sensor Circuit Low Input code indicates that the engine control module (ECM) has detected low voltage from the power steering pressure sensor. This sensor monitors the hydraulic pressure in the power steering system, and low input can lead to poor steering performance, especially at low speeds.
P0552 – Quick Overview
| Code | Information |
|---|---|
| Meaning | P0552: Power Steering Pressure Sensor Circuit Low Input |
| Is it serious? | Yes, as it can cause poor steering response and make low-speed maneuvers difficult. |
| Possible causes | – Faulty power steering pressure sensor – Low voltage in wiring – Faulty power steering pump |
| How to diagnose? | – Test the power steering pressure sensor – Check wiring for low voltage – Inspect the power steering pump |
P0552 Meaning
The P0552: Power Steering Pressure Sensor Circuit Low Input code is triggered when the ECM detects a voltage from the power steering pressure sensor that is below the expected range. This sensor provides feedback to adjust engine idle speed during low-speed steering maneuvers. Low voltage could indicate a faulty sensor, wiring issues, or a malfunctioning power steering pump.
Step-by-step diagnostic guide
| Action | Description | Tools Needed |
|---|---|---|
| Check for Other Codes | Use an OBD-II scanner to check for related fault codes that may provide additional information about the power steering system issue. | OBD-II Scanner |
| Test the Power Steering Pressure Sensor | Use a multimeter or diagnostic tool to check the voltage output of the power steering pressure sensor and compare it to the manufacturer’s specifications. | Multimeter, Diagnostic Tool |
| Check Wiring for Low Voltage | Inspect the wiring and connectors leading to the power steering pressure sensor for loose connections, damage, or corrosion. Measure voltage to ensure it’s within specification. | Flashlight, Multimeter |
| Inspect the Power Steering Pump | Check the power steering pump for signs of wear or leaks that could result in low hydraulic pressure and poor performance. Replace if necessary. | Basic Tools, Inspection Mirror |
| Clear the Code and Test Drive | After repairs, clear the code using an OBD-II scanner and test drive the vehicle to ensure proper power steering function. | OBD-II Scanner, Vehicle Manual |
| Recheck for Codes | Re-scan the vehicle after the test drive to ensure that the P0552 code hasn’t returned. | OBD-II Scanner |
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I test OBD-II scanners and make DIY Engine diagnostics guides to help you solve your car problems without having to depend on the mechanic. A lot of them will try to scam you or are just no help at all. About Juraj Lukacko