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.
When the push-button ignition switch input, which inputs to the Intelligent Key unit, continues for 100 seconds or more, B2556 push-button ignition switch judges that it is the malfunction and displays the DTC (Diagnostic Trouble Code)