Methods, system and devices for monitoring a closed loop control operation including signal levels received from an analyte sensor and automatic delivery of medication at least in part in response to the received analyte sensor signals, determining whether the signal level received from the analyte sensor is associated with one of a fault condition or a potential fault condition, and dynamically adjusting a current infusion rate executed by the closed loop control operation when it is determined that the signal level from the analyte sensor is associated with one of the fault condition or potential fault condition, where medication delivery rate is adjusted to a first predetermined range when the signal level is associated with the fault condition, and adjusted to a second predetermined range when the signal level is associated with a potential fault condition, and where the first predetermined range is narrower compared to the second predetermined range are provided.