P0551 code — how to fix error fast

Getting a powertrain-related OBD2 code is never pleasant, and the code P0551 is one of the most common such codes. Those that faced it in their cars before know how difficult it may be to tackle the consequences, so if you saw the code in your car already, it’s time to dig into the P0551 code meaning.

We want you to be completely prepared to deal with this code, which is why our team decided to give you a complete guide. In it, we’ll discuss some of the most common reasons behind the code, ways of diagnosing it, and prevention methods to take for making sure that the code remains solved for good.

Why you can trust REREV’s OBD2 code advice: Our automotive expert researchers with experienced mechanics undertakes a thorough research methodology to deliver precise insights on OBD codes. Find out more about OBD2 codes research process..

What does the P0551 code mean?

The P0551 code is a DTC that indicates a problem with the power steering pressure sensor circuit in a vehicle. This code can be triggered by a variety of issues, including faulty sensors, wiring issues, or problems with the power steering pump.

It’s important to understand this code because it can indicate a serious problem with the power steering system that can lead to difficulty steering or even loss of control of the vehicle.

To put it simply – if you encounter this code, you may not receive a warning for low steering pressure within the system, and that could lead to serious safety concerns while driving.

What causes the P0551 code?

The P0551 code can be caused by a number of different issues and they all come with a specific set of symptoms and signs. This can even be good for you since you can make use of these symptoms to figure out which cause could be behind the code in your car, but it’s still good to have a complete look:

Bad power steering pressure sensor

The power steering pressure sensor is responsible for monitoring the pressure of the power steering fluid in the system. If this sensor is faulty, it may send incorrect readings to the vehicle’s computer, triggering the P0551 code.

Wiring issues

Problems with the wiring that connects the power steering pressure sensor to the vehicle’s computer can also cause the P0551 code to appear. This can include damaged or corroded wiring, loose connections, or other electrical issues.

Problems with the power steering pump

Issues with the power steering pump itself can also cause the P0551 code. This can include problems with the pump’s pressure relief valve, damaged seals, or other issues that affect the pressure of the power steering fluid.

Which car models does the P0551 code affect the most?

Any car with a power steering system could potentially be affected by the code P0551. However, some car models may be more likely to experience this issue than others. Here are a few car models that have been reported to be affected by the code P0551:

• Ford Explorer: The Ford Explore is one of the models that have been known to experience this issue due to a faulty power steering pressure sensor.
• Dodge Charger: The Dodge Charger along with the Challenger has been known to experience issues with the power steering pressure sensor circuit.
• Chevrolet Suburban: The Chevrolet Suburban is among GM models that have been reported to have issues with the power steering pressure sensor circuit.

How to diagnose the P0551 code

Diagnosing the code P0551 involves a series of steps to identify the root cause of the issue. Here are some of the main ways of diagnosing the code:

Visual inspection

A visual inspection of the power steering system can help determine if there are any damaged or disconnected wiring, hoses, or connectors.

Using an OBD2 scanner

A scan tool can be connected to the car’s onboard diagnostic system (OBD-II) to retrieve error codes and data related to the power steering pressure sensor circuit.

Checking the pressure sensor with a multimeter

Using a multimeter, voltage tests can be performed on the power steering pressure sensor and its circuit to check for proper voltage readings.

Pressure tests

A pressure gauge can be used to measure the power steering pressure and check for any irregularities or inconsistencies.

How to fix the P0551 code

Fixing the P0551 code will depend on the underlying cause of the issue. Here are some potential fixes and cost estimates for each:

Replace the faulty power steering pressure sensor

If the sensor is faulty, it will need to be replaced. The cost of a replacement sensor can range from $50 to $150, depending on the make and model of the vehicle.

Repair the wiring

If the wiring is damaged or corroded, it may need to be repaired or replaced. The cost of this repair will depend on the extent of the damage and the amount of labor required.

Replace the power steering pump

If the pump is the issue, it will need to be replaced. Replacing the power steering pump can range from $300 to $800, depending on the make and model of the vehicle.

How to prevent the P0551 code

Preventing the P0551 code requires proper maintenance of the power steering system. Here are some preventative measures you can take:

• Regularly check the power steering fluid level and condition, and top off or replace the fluid as needed.
• Have the power steering system inspected as part of your vehicle’s routine maintenance schedule
• Be aware of any unusual noises or difficulty steering, and have the vehicle inspected if these issues arise.

By following these preventative measures, you can help ensure that your power steering system remains in good working order and prevent the P0551 code from occurring in the future.

Our take

Ultimately, the P0551 code can indicate a serious problem with the power steering system in a vehicle. You can only ensure maximum driving safety when the code occurs if you act swiftly to replace faulty components to restore the pressure sensor and obtain correct information about the power steering fluid flow, and this guide hopefully delivers when it comes to doing just that.