P0304 on the 2000 Ford Focus
The bulletins listed name this code in NHTSA's summary, or are about the same components. A bulletin or a recall listed here may apply to the model year. None of it is a diagnosis.
Nobody has written a description of this code yet.
| 020901 | 2002-12-03. Service bulletin. ROUGH IDLE, LOW POWER AND / OR STALL AT IDLE, A MALFUNCTION INDICATOR LAMP ILLUMINATED AND DIAGNOSTIC TROUBLE CODES P0300 THROUGH P0304 STORED IN MEMORY. *TT |
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| 0291 | 2002-11-05. Service bulletin. SOME VEHICLES EQUIPPED WITH THE 2.0L SPI ENGINE MAY EXHIBIT A MALFUNCTION INDICATOR LAMP (MIL) ILLUMINATED AND DIAGNOSTIC TROUBLE CODES (DTC) P0300 THROUGH P0304 STORED. *TT |
| 01413 | 2001-05-30. Service bulletin. MALFUNCTION INDICATOR LAMP (MIL) ILLUMINATED AND DIAGNOSTIC TROUBLE CODES (DTCS) P0300 THROUGH P0304 STORED IN MEMORY SOME VEHICLES EQUIPPED WITH THE 2.0L SPI ENGINE. *TT |
| 14572 | 2001-04-02. Service bulletin. SOME VEHICLES EQUIPPED WITH THE 2.0L SPI ENGINE MAY EXHIBIT A CHECK ENGINE LIGHT ON AND DIAGNOSTIC TROUBLE CODE P0301, P0302, P0303, AND P0304 (MISFIRE CYL). *TT |
4 on file from NHTSA, as of 2026-10-19. See them in the bulletin list. A bulletin lists model years: read the document for which vehicles it concerns.