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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 $79.99. 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.
This Diagnostic Trouble Code (DTC) indicates a Power Steering Pressure Sensor Circuit Malfunction.
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.
One or more of the following faults may cause this DTC:
You may experience one or more of the following when this code is stored:
Your mechanic may perform the following diagnostic procedures:
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.
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.
One or more of these measures may be required:
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.
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.