P0554 OBD Error Code: Problem & Solutions

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P0554 is a diagnostic trouble code (DTC) for "Power Steering Pressure Sensor Circuit Intermittent". This code is detected when an intermittent voltage from the Power Steering Pressure Sensor is sent to Engine Control Module (ECM). This code signifies that the PCM didn’t receive a voltage indicator from the power steering pressure sensor that was in proportion to the steering angle sensor input signal. Usually, this problem occurs at low speeds. If you enjoy your power steering, you’ll definitely want to get this problem addressed ASAP.

OBD-II Code Engine may stall when pulling into a parking spot is defined as a Power Steering Pressure Sensor/Switch Circuit Intermittent. This generic powertrain diagnostic trouble code (DTC) typically applies to all OBD-II vehicles equipped with a power steering pressure sensor. It indicates that PCM has detected a fault in the power steering pressure sensor circuit. The Power Steering Pressure Sensor tells the engine control module (PCM) that the engine idle speed needs to be held at a specified level while the driver is operating the Power Steering System at slow vehicle speeds. This sensor is a potentiometer which transforms the power steering load into output voltage, and emits the voltage signal to the Engine Control Module (ECM).

The ECM illuminates the check engine light with P0554 and associated codes when it recognizes one or multiples condition outside a specific desired range within the power steering pressure sensors circuit.

What causes this problem with the Power Steering Pressure Sensor Circuit Intermittent?

• Faulty power steering pressure sensor
• Leakage of power steering fluid
• Damaged or broken wiring or connector
• Faulty fuse/relay
• Power steering pump failure

1. Power Steering Pump - A power steering pump is a part of the steering system that makes it easier to turn the steering wheel. A faulty power steering pump can lead to hard steering which can even lead to accident as well. Replace it if you find it faulty.
2. Power Steering Pressure Sensor - It’s clear with the description that this code is related to power steering pressure sensor. The Power Steering Pressure Sensor tells the engine control module (PCM) that the engine idle speed needs to be held at a specified level while the driver is operating the Power Steering System at slow vehicle speeds. Power steering pressure (PSP) sensor should work efficiently to avoid all the associated trouble codes.
3. Power Steering Fluid - Power steering fluid should not be dirty and its level should be up to the mark. Always top up the level of power steering fluid if you find its level low and replace the burnt and dirty one to avoid related trouble codes. A faulty power steering pump can lead to hard steering which can even lead to accident as well. Make sure it is working efficiently to avoid the associated error codes and accidents.
4. ECM/PCM - An engine control unit, also commonly called an engine control module, is a type of electronic control unit that controls a series of actuators on an internal combustion engine to ensure optimal engine performance. If the brain is out of control how does the body will work; same goes with your vehicle if the ECM is not working efficiently than your vehicle will not work smoothly. So, get it repair or replace as required if you discover it faulty.

Some common symptoms for this trouble code P0554 are below mentioned. If you discover any one of them, kindly take your vehicle to the reputed repair facility.

• Inoperative power steering
• Leakage of power steering fluid
• Frayed power steering pressure sensor
• Faulty power steering pump
• Erratic Idle
• Problematic steer

The error code P0554 has to be addressed as soon as it is discovered because engine stalling could be really frustrating. Moreover, you might face the difficulty while steering and inoperative power steering is really a problem for those who are not used to of manual steering. To fix this code following repairs and replacements may help:

• Check out carefully the power steering pressure sensor and replace it if discovered faulty.
• Change the dirty power steering fluid.
• Inspect the corresponding wiring and look for loose or corroded connector, repair or replace them as required.
• Repair or replace the power steering system and related circuits.

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To avoid any mistakes while diagnosing this code, it is always recommended to have your vehicle diagnosed with the help of qualified technician. Steps to diagnose this code are as follows:

• Verify and record the integrity of your battery and charging system before further troubleshooting.
• Check your parking space, any signs of a leak? If so, investigate further.
• Check your power steering fluid level and top up as necessary.
• To rule out the sensor, you will need to test it. Most times these are hard aluminium/braided rubber lines and can be accessed from under the hood.
• Locate the electrical connector on the pressure sensor. Inspect for any oil residue/soaking. If the connector is soaked in oil, obviously the leak is a problem but the oil must be cleaned before reconnecting. A connector showing signs of melting and/or corrosion must be repaired.
• Check for physical damage. If the lines aren't fastened properly, the sensor may be rubbing on something and over time could cause an electrical problem of some sort.
• Verify the integrity of the power steering pressure sensor circuit(s).

Common Mistakes When Diagnosing the P0554 Code

Due to this code, one of the issues you might face is engine stalling at low speed and because of engine stalling people usually blame the idle air control system for the issue where in the actual cause is something else.