Fault code P0550 – a step-by-step guide to diagnosing and fixing it

Error code P0550 is displayed and the check engine light is on - what does this mean?

The DTC P0550 is triggered by the OBD/EOBD system when a fault is detected in the power steering system. This fault code indicates problems with the power steering pressure sensor or the power steering electrical circuit.

What can cause this fault code?

• Defective power steering pressure sensor
• Damaged wiring to the pressure sensor
• Corroded or loose plug connections
• Low power steering fluid level
• Defective power steering pump
• Clogged power steering filter
• Faulty control unit software

What symptoms occur in parallel with fault code P0550?

• Sluggish steering: The steering wheel can only be moved with increased effort
• Unusual noises: Squeaking or howling when steering, especially when parking
• Jerky steering: The steering feels uneven or rough
• Increased fuel consumption: The engine has to work harder to support the power steering
• Warning lights: In addition to the check engine light, a power steering warning may also come on

How to fix the problem of error code P0550?

• Repairing error code P0550 requires a systematic diagnosis of the power steering components.
• Check the power steering fluid level and top up if necessary, checking for leaks in the system
• Replace the power steering pressure sensor if it is defective or provides incorrect values
• Check the wiring and plug connections to the pressure sensor for damage, corrosion or loose contacts and repair them
• Replace the power steering pump if it does not build up the required pressure or has mechanical defects
• Change the power steering filter and flush the entire system to remove impurities
• Update the control unit software or have the control unit reprogrammed