HONDA
Reported code forms P0304
ROUGH IDLE, HARD TO START, POOR ENGINE PERFORMANCE, OR MALFUNCTION INDICATOR LAMP (MIL) COMES ON WITH DIAGNOSTIC TROUBLE CODE (DTC) P0301, P0302, P0303, P0304, OR P0172. *TT *EH
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P0304 · Manufacturer communications
Source wording can vary by vehicle and suffix. It is shown as written, not as a universal diagnosis.
HONDA
Reported code forms P0304
SOME VEHICLES MAY EXHIBIT A MALFUNCTION INDICATOR LIGHT ON WITH MISFIRE DIAGNOSTIC TROUBLE CODES P0301, P0302, P0303, OR P0304. *TT
HONDA
Reported code forms P0304
MALFUNCTION INDICATOR LAMP (MIL) IS ON WITH MISFIRE DIAGNOSTIC TROUBLE CODE(S) (DTC(S) P0301, P0302, P0303, P0304. *TT