P0550 OBD-II Trouble Code: Power Steering Pressure Sensor Circuit Malfunction

Our certified mechanics come to you · 12-month, 12,000-mile warranty

SCHEDULE P0550 DIAGNOSTIC Get a fair and transparent estimate upfront
Red-stars EXCELLENT RATING ON

Cost of diagnosing the P0550 code

P0550 is a diagnostic trouble code (DTC) for "Power Steering Pressure Sensor Circuit Malfunction". 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 for $70.00. Once we are able to diagnose the problem, you will be provided with an upfront quote for the recommended fix and receive $30.00 off as a credit towards the repair. All our repairs are backed by our 12-month / 12,000-mile warranty.

Cars Estimate Credit towards follow-up repair Earliest Availability
Ford$70.00$30.00
Toyota$70.00$30.00
BMW$70.00$30.00
SCHEDULE P0550 DIAGNOSTIC Get a fair and transparent estimate upfront

Check Engine Light

P0550 code definition

This Diagnostic Trouble Code (DTC) indicates a Power Steering Pressure Sensor Circuit Malfunction.

What the P0550 code means

Power steering is a luxury most drivers have come to take for granted. The power steering pressure (PSP) sensor facilitates smooth handling by telling the vehicle’s computer how much force should be needed to turn the steering wheel at a certain angle. This signal works in conjunction with signals sent to the PCM by the steering angle sensor (SAS).

When the signal from the PSP sensor and the signal from the SAS are too far out of sync, the power steering pump doesn’t know how much additional support to provide, and the computer will store P0550.

What causes the P0550 code?

One or more of the following faults may cause this DTC:

  • A bad PSP sensor
  • Damage or a short or open in the PSP sensor wiring
  • Loose or damaged PSP sensor connectors
  • Bad or incorrect power steering fluid
  • A power steering fluid leak
  • A faulty power steering pump
  • Rack and pinion failure

What are the symptoms of the P0550 code?

You may experience one or more of the following when this code is stored:

  • Power steering fluid leak
  • Stalling while driving at low speeds
  • Decreased fuel economy
  • Only manual steering ability
  • No noticeable symptoms (rare)
  • A lit Check Engine or Service Engine Soon Light (may take up to three drive cycles to illuminate)

How does a mechanic diagnose the P0550 code?

Your mechanic may perform the following diagnostic procedures:

  • Visually inspect the PSP sensor and related wiring and connectors
  • Check power steering fluid level and condition
  • Test the power steering pump for leaks
  • Check the condition of the rack and pinion
  • Scanning the vehicle’s computer to verify any codes present and record freeze frame data
  • Clear the codes to see if they return upon test driving (in order to diagnose an intermittent condition)

Common mistakes when diagnosing the P0550 code

Due to similar symptoms being common when there is a problem with the idle air control system (such as stalling while turning at low speeds), this system may be blamed in error.

How serious is the P0550 code?

The most serious problem associated with a PSP sensor circuit malfunction is the risk of stalling while driving. This can present a safety hazard, as well as being inconvenient. In addition, most drivers are not experienced with manual steering, making driving the vehicle much more challenging under these conditions.

What repairs can fix the P0550 code?

One or more of these measures may be required:

Additional comments for consideration regarding the P0550 code

Modern power steering systems are complex units which provide varying pressure depending upon the signals sent to the PCM by the PSP sensor. The proper function of this system has an effect on multiple other vehicle systems, including emissions, RPM calculations, and fuel economy. In addition, driving a vehicle with an existing power steering problem can be physically strenuous as well as potentially dangerous if the vehicle stalls out in the middle of traffic.

You may be tempted to try a power steering repair at home; however, power steering fluid is under tremendous pressure, as well as being flammable. The safest and most efficient way to have this problem repaired is to have a qualified technician diagnose and fix the issue.

Need help with a P0550 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.

trouble codes
Check Engine Light
P0550

Fast and easy Check Engine Light is on Inspection service at your home or office.

SCHEDULE P0550 DIAGNOSTIC
Get a fair and transparent estimate upfront

Recent Check Engine Light is on Inspection reviews

Excellent Rating


YourMechanic Check Engine Light is on Inspection Service

Average Rating

4.5/5

Number of Reviews

3,901

Rating Summary
3,566
166
43
25
101
3,566
166
43
25
101

Kinder

18 years of experience
40 reviews
Kinder
18 years of experience
Great technician patiently explained malfunction of an old Dodge truck was prompt and punctual, repaired truck in about 45 minutes I would recommend Kinder Mike R
1998 DODGE RAM 1500 - CHECK ENGINE LIGHT IS ON - DOUGLASVILLE, GEORGIA

William

31 years of experience
152 reviews
William
31 years of experience
William answered all of my questions, was flexible with the service that he provided, and made sure that I knew what the next steps were. 10/10 would recommend him as a mechanic for my next job.
2014 BMW 320I - CHECK ENGINE LIGHT IS ON - SURPRISE, ARIZONA

Richard

8 years of experience
350 reviews
Richard
8 years of experience
Great Service
2012 GMC TERRAIN - CHECK ENGINE LIGHT IS ON - UPPER MARLBORO, MARYLAND

Jerome

31 years of experience
68 reviews
Jerome
31 years of experience
Great
2002 TOYOTA CAMRY - CHECK ENGINE LIGHT IS ON - BOWIE, MARYLAND

More related articles

P0222 OBD-II Trouble Code: Throttle/Pedal Position Switch/Sensor B Circuit Low Input
P0222 code definition Throttle/Pedal Position Switch/Sensor B Circuit Low Input What the P0222...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...

Related questions

Q: P0741 OBD code

Hello, thanks for writing in about your Volkswagen Passat. Trouble code P0741 indicates: Torque Converter Clutch Circuit Performance or Stuck Off. If you need help with getting this fixed, consider YourMechanic, as one of our mobile technicians can come to...

Q: Would a bad battery cause my check engine light to come on and my windows to not work on my 2014 Chevrolet Malibu

Hello. If the battery is low then it can cause the check engine light to come on and other electrical issues to occur. If the battery is giving you problems then it should be replaced and the computer scanned for...

Q: Car completely died after diagnostics scan, dealer says to replace kvm and body control module, very expensive! How and y?

Hello, thank you for writing in. You are in a tricky situation. It is very rare that simply pulling the diagnostic codes with a scanner would cause any kind of issue. The problem has likely stemmed from the keyless vehicle...

How can we help?

Our service team is available 7 days a week, Monday - Friday from 6 AM to 5 PM PST, Saturday - Sunday 7 AM - 4 PM PST.

1-800-701-6230 · hi@yourmechanic.com