P0304 chevrolet description when a misfire occurs engine speed will fluctuate if the engine speed fluctuates enough to cause the crankshaft position sensor signal to vary the engine control module can determine that a misfire is occurring. This diagnostic trouble code dtc is a generic powertrain code which means that it applies to obd ii equipped vehicles although generic the specific repair steps may vary depending on make model a p0304 code means that the the cars computer has detected that one of the engines cylinders is not firing properly in this case its cylinder 4. P0304 chevrolet comments help us improve autocodescom leave a comment below or tell us if the information above help you fix the code what are the symptoms on your vehicle for the p0304 chevrolet code have you replaced any parts any information is appreciated thanks. When diagnosing a p0304 code it is important to record the freeze frame information and then duplicate the code setting conditions with a test drive pay close attention to the engine load throttle position rpm and road speed because a p0304 which is a specific misfire can sometimes be difficult to detect. Check engine light code p0304 how does a p0304 code trigger the check engine light this code will trigger the check engine light as follows the misfire detection monitor a software strategy built into the computer is designed to detect an engine misfire the computer can also normally identify the specific cylinder in which the misfire
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