What does code P1550 mean?

Q: What does code P1550 mean?

Power Steering Pressure Sensor Out of Self-Test Range. P1550 on Ford vehicles means the Power Steering Pressure (PSP) sensor is reporting a voltage outside the range the Powertrain Control Module (PCM) expects during its self-test. The PCM uses this sensor to detect steering load and raise idle speed to prevent stalling, so an out-of-range signal indicates a sensor, wiring, or pressure problem rather than a steering rack failure by itself.

DTC codes / Ford codes / P1550

P1550 · FordPower Steering Pressure Sensor Out of Self-Test Range

P1550 on Ford vehicles means the Power Steering Pressure (PSP) sensor is reporting a voltage outside the range the Powertrain Control Module (PCM) expects during its self-test. The PCM uses this sensor to detect steering load and raise idle speed to prevent stalling, so an out-of-range signal indicates a sensor, wiring, or pressure problem rather than a steering rack failure by itself.

SystemPowertrain

Code typeFord specific

SeverityMedium

Fix difficultyIntermediate

AreaVehicle speed, idle control and auxiliary inputs

Guidance is general and written for Ford vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.