Raw fuel is also passing through the cylinder into the exhaust. Driving with a misfire can damage that catalytic converter. Unlike a lot of the OBDII codes, this code has to do directly with engine combustion. These particular codes indicate that there is a misfire in one of the other cylinders as well.įixing P0302 should be a high priority. It will often be accompanied by codes P0301-P0308. The nice thing about it is that the P0302 has tracked the problem to a particular cylinder, which makes diagnosing the problems simpler than P0300, which means that the cylinders are randomly misfiring. P0302 is certainly a cause for concern, and can be a threat to the drivability the Jeep Grand Cherokee. P0302 is a relatively common Jeep Grand Cherokee trouble code.
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