For facilitating error localization, software-based error detection techniques have been proposed and EDM (error detection mechanisms) transformation is one of these techniques. To discuss the effectiveness of EDM for electrical bug localization, two scenarios are considered; (1) localizing an electrical bug occurred in the original program, and (2) localizing as many potential bugs as possible. We experimentally evaluated the error detection performance in these two scenarios under dynamic power supply noise. Experimental results show that the EDM transformation customized for quick error detection cannot locate electrical bugs in the original program in the firs scenario, but it is useful for findin potential bugs in the second scenario.