Diagnosis Description
WARNING: This page is about a different car, the 2008 Infiniti M45 and 2008 Infiniti M35. However, it is still accessible from the selected car via links, so may be relevant.
Though the communication between the Intelligent Key unit and the steering lock unit is normal, when the steering lock/unlock is not normal, B2551 steering lock unit malfunction judges that it is the malfunction and displays the DTC (Diagnostic Trouble Code)