DTC P0550: Power Steering Switch Malfunction: Condition

DTC is set when PCM receives power steering switch low voltage input at terminal No. 31 for more than 60 seconds while vehicle is operating at more than 37 MPH and ECT is more than 140°F. Possible causes are:

• Power Steering Pressure (PSP) switch malfunction.
• Open or short circuit.
• PCM malfunction.