2005 Dodge grand caravan, po300 code, runs and drives great but rough idle, just replaced spark plugs and coil and spark plug wires, no more code for cylinder 4 but still have po300 code coming on???
P0300 Random misfire
Look for any vacuum hose that may have come out this would cause a rough idle and not necessary set a lean code condition
Here on this Dodge a vacuum hose somehow was disconnected, this set a P0300, the find was easy because you could hear vacuum noise. it did not set a Lean code condition but a P0300.
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