The P0553: Power Steering Pressure Sensor Circuit High Input code indicates that the engine control module (ECM) has detected a higher-than-expected voltage from the power steering pressure sensor. This sensor monitors the hydraulic pressure in the power steering system and provides feedback to adjust engine idle speed during low-speed maneuvers.
P0553 – Quick Overview
| Code | Information |
|---|---|
| Meaning | P0553: Power Steering Pressure Sensor Circuit High Input |
| Is it serious? | Yes, as it may cause erratic steering and difficulty during low-speed maneuvers. |
| Possible causes | – Faulty power steering pressure sensor – High voltage in wiring – Faulty power steering pump |
| How to diagnose? | – Test the power steering pressure sensor – Check wiring for high voltage – Inspect the power steering pump |
P0553 Meaning
The P0553: Power Steering Pressure Sensor Circuit High Input code is triggered when the ECM detects that the voltage from the power steering pressure sensor is higher than expected. This sensor helps regulate the power steering system by adjusting engine idle speed based on steering pressure. High voltage could result in incorrect sensor readings, leading to erratic steering performance.
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 context about the power steering system. | OBD-II Scanner |
| Test the Power Steering Pressure Sensor | Use a multimeter or diagnostic tool to measure the voltage output from the power steering pressure sensor and ensure it is within manufacturer specifications. | Multimeter, Diagnostic Tool |
| Check Wiring for High Voltage | Inspect the wiring and connectors for signs of damage, corrosion, or loose connections. Check the voltage to ensure it is not exceeding manufacturer specifications. | Flashlight, Multimeter |
| Inspect the Power Steering Pump | Check the power steering pump for signs of malfunction, leaks, or high pressure that could lead to improper sensor readings. 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 performance. | OBD-II Scanner, Vehicle Manual |
| Recheck for Codes | Re-scan the vehicle after the test drive to ensure the P0553 code hasn’t returned. | OBD-II Scanner |
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