P0204 on the 2016 Mazda Mazda2
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.
| 01-004-17-3317a | 2017-10-21. Service bulletin. Some vehicles may experience an engine that runs rough and the check engine light on with DTCs P0201 and P0204 or P0202 and P0203. NOTE: Engine misfire related DTCs (P0301, P0302, P0303, P0304) are usually stored at the same time. P0201:00 : Fuel injector circuit/open cylinder No.1 P0202:00 : Fuel injector circuit/open cylinder No.2 P0203:00 : Fuel injector circuit/open cylinder No.3 P0204:00 : Fuel injector circuit/open cylinder No.4 This concern may be caused by an internal failure of the PCM (DENSO produced only). To correct the concern, the PCM internal failure has been eliminated. |
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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.