Malfunctioning
A malfunctioning system is difficult to control. Crew actions involving the system (except the hold it together and patch engineer actions) take a –4 penalty. Also, crew members can’t take push actions (see page 322) using that system. If the power core is malfunctioning, all actions aboard the starship not involving the power core take a –2 penalty; this penalty stacks with penalties from critical damage conditions affecting other systems.
Source
Core Rulebook pg. 321
