DTC C2551 Power Supply Relay

Trouble symptom:

NOTE: If power supply voltage failure exists at the vehicle side, the warning light goes off if the normal voltage returns.

Wiring diagram:

Fig 1: Electric Power Steering System Wiring Diagram (Power Supply Relay) With Connector End View

Courtesy of SUBARU OF AMERICA, INC.

Fig 2: Power Supply Relay Diagnosis Flowchart

Courtesy of SUBARU OF AMERICA, INC.