Limited Operating System

PURPOSE
Limited Operating Strategy (LOS) is back-up strategy in the Powertrain Control Module (PCM), maintaining vehicle operation if one or more inputs fail.

OPERATION
When sensor input is perceived to be out of limits by the PCM, it substitutes a fixed in-limit sensor value and continues to monitor the faulty sensor input. If the faulty sensor begins to operate within limits, the PCM will return to normal engine running strategy. When the vehicle is operating in LOS, the CHECK ENGINE light will be ON.