P0551 OBD-II Trouble Code: Power Steering Pressure Sensor Circuit Range/Performance

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Cost of diagnosing the P0551 code

P0551 is a diagnostic trouble code (DTC) for "Power Steering Pressure Sensor Circuit Range/Performance". This can happen for multiple reasons and a mechanic needs to diagnose the specific cause for this code to be triggered in your situation. Our certified mobile mechanics can come to your home or office to perform the Check Engine Light diagnostic. Once we are able to diagnose the problem, you will be provided with an upfront quote for the recommended fix and receive $20.00 off as a credit towards the repair. All our repairs are backed by our 12-month / 12,000-mile warranty.

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P0551 code definition

The definition of the P0551 trouble code is that the power steering pressure sensor circuit range/performance is compromised or malfunctioning.

What the P0551 code means

When this code set it means that the powertrain control module did not receive the correct voltage input signal from the power steering pressure sensor. Most of the time, this issue will occur at lower vehicle speeds. Some types of vehicles will need to have multiple failure cycles for this to cause the Check Engine light to come on. However, after the first failure, the trouble code should be stored in the onboard computer.

What causes the P0551 code?

Some of the most common causes of the P0551 code are as follows:

  • Dirty power steering fluid
  • Malfunction of the power steering system
  • Problems with the wiring or connector for the power steering pressure sensor
  • Power steering pressure sensor could be defective

What are the symptoms of the P0551 code?

Here are some of the most common symptoms that drivers noticed with the P0551 trouble code:

  • Vehicle performance problems
  • Decrease in fuel economy
  • Drivers may notice a power steering fluid leak
  • Check Engine light may come on
  • A vehicle may stall when driving at slow speeds and turning the steering wheel
  • In rare instances, the driver may not notice any issues at all with the vehicle

How does a mechanic diagnose the P0551 code?

When they are diagnosing the P0551 code, the mechanic will record the information stored in the onboard computer with their scanner. They will then reset the code and test the vehicle to see if the code returns. If it is not a false alarm, they will then try to pinpoint the actual problem with the vehicle and make the necessary repairs to remove the code.

Common mistakes when diagnosing the P0551 code

Because of the possibility of the engine stalling when driving and turning at low speeds, many will mistakenly blame the idle air control system for the issue rather than the power steering pressure sensor circuit and issues with the power steering system.

It is always a good idea for mechanics to fully diagnose and explore the potential problems with the vehicle so they can find the exact cause and repair it properly. One of the first things the mechanic will likely want to consider is the power steering fluid. They want to make sure there is enough, and that it is clean.

How serious is the P0551 code?

The P0551 code can be quite problematic. In many cases, the vehicle is going to suffer from some serious performance issues. In addition to possibly having a power steering fluid leak, it is also possible that the fuel economy for the vehicle is not quite as robust as it used to be. One of the most troubling aspects of the P0551 code is that those vehicles that have the code stored often have trouble when it comes to stalling out during low-speed vehicle maneuvers. This has the potential to be very dangerous, therefore getting the code fixed and the vehicle repaired as quickly as possible is essential.

What repairs can fix the P0551 code?

The following are some of potential repairs that can be used to fix the P0551 code:

  • Scanning the vehicle, resetting the code, and testing to see if it comes back
  • Changing the power steering fluid
  • Replacing corroded wires or connectors
  • Repair or replace the power steering system
  • Repair or replace the power steering pressure sensor circuit

Additional comments for consideration regarding the P0551 code

Since these issues presented by the P0551 code can be dangerous, it is important to have them taken care of immediately. Get the problem checked out by a certified mechanic as quickly as you can to reduce the risk of further problems.

Need help with a P0551 code?

YourMechanic offers certified mobile mechanics who will come to your home or office to diagnose and repair your vehicle. Get a quote and book an appointment online or speak to a service advisor at 1-800-701-6230.

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Anthony

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Anthony
6 years of experience
Jeep Grand Cherokee - Check Engine Light is on - Carmichael, California
Anthony was great! We are very happy that we chose to go with this company instead of the overpriced and slow service we get from the Jeep dealership. He was on time and did the job just as expected. He identified a couple of other things that need to be done before the problems get worse. We appreciate having a technician give us direct feedback regarding our vehicle, rather than a service advisor (salesperson) that we've had to deal with in the past at the dealership. We'll be booking the addtional services very soon and will definitely request Anthony again now that he is familiar with our vehicle!

Michael

37 years of experience
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Michael
37 years of experience
Subaru Forester - Check Engine Light is on - Santa Fe Springs, California
Michael was punctual and courteous. He knows what he’s doing and I would absolutely recommend him to anyone.

Anthony

6 years of experience
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Anthony
6 years of experience
BMW 740Li - Check Engine Light is on - Roseville, California
Very helpful in finding out the fault codes in my bmw 740 li. It was simple fix and that the two tube hose just had to be connected and my drive train malfunction went away. This saved me from having to go the an expensive dealership. Anthony has a good attitude about his work.

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19 years of experience
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Breck
19 years of experience
Ram 1500 - Check Engine Light is on - Houston, Texas
Breck did a great job working on my truck. Showed up on time, found any issues I had on my truck and explained everything to me so that I understood what was going on. Went above and beyond, definitely will book him for future appointments.


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