P0304 Code: Easy Steps to Solve It
The P0304 code is a diagnostic trouble code (DTC) that indicates a misfire detected in cylinder 4 of the engine. This code is part of the OBD-II system and is commonly found in various vehicle makes and models. When the engine control module (ECM) detects an irregularity in the combustion process of cylinder 4, it triggers this code and usually illuminates the check engine light.