What is a possible indicator of a failing starter interlock?

A possible indicator of a failing starter interlock is when the vehicle starts in any gear. The starter interlock system is designed to prevent the engine from starting unless the transmission is in the correct gear, typically "Park" for automatic transmissions or "Neutral" for manual. If the vehicle can start when it is in any gear, this indicates that the interlock mechanism is malfunctioning. This safety feature is crucial, as it helps prevent accidents caused by starting the vehicle while it is not properly positioned for safe operation.

Other options, while they highlight various issues, do not specifically relate to the functioning of the starter interlock as clearly as the ability to start in any gear does. For example, the engine starting without the key pertains to ignition switch or anti-theft system failures rather than the starter interlock, while the key removal while running relates to problems with the ignition lock cylinder. Dashboard lights turning on is a normal function indicating the electrical system is operational but does not directly address the starter interlock functionality.