P0304 on the 2009 Jaguar XF
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.
| SSM-63697 | 2016-09-02. Service bulletin. "REPUBLISHED AUGUST 2013. ISSUE: FUEL INJECTOR CONCERNS, (APPLICABLE TO 5.0 AJ133 GASOLINE ENGINES), LEADING TO POTENTIAL PROBLEMS SUCH AS POOR RUNNING, POOR FUEL ECONOMY, HARD STARTING, ROUGH IDLE, MISFIRES AND ENGINE DETONATION. CUSTOMER SYMPTOMS MAY INCLUDE THE ENGINE CHECK LAMP ILLUMINATED WHICH MAYBE ACCOMPANIED WITH A MISFIRE/ENGINE VIBRATION AT IDLE. MISFIRE CODES (P0301, P0302, P0303, P0304, P0305, P0306, P0307, P0308, P0316) ARE STORED IN THE PCM DEPENDENT ON THE AFFECTED CYLINDER(S). CAUSE: POOR FUEL QUALITY OR FUEL CONTAMINANTS RESTRICTING THE FUEL INJECTOR FLOW RATE." |
|---|
1 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.