P0300 on the 2018 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.
| TSB18-2093 | 2018-05-21. Service bulletin. Some 2015-2018 Focus ST vehicles may exhibit a misfire condition and/or illuminated MIL with DTCs P0300 and/or P0316 with engine coolant temperature below 49°C (120°F). Follow the Service Procedure steps to correct the condition. |
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| SSM 46907 | 2018-01-29. Service bulletin. Some 2015-2018 Focus ST vehicles may exhibit MIL On with DTC's P0300 and/or P0316 store in Powertrain Control Module(PCM) memory. Vehicle may also exhibit perceived misfire after cold start until Engine Coolant Temperature(ECT) reaches 49 degrees C (120 degrees F) Install (4) new CYFS-12-YEC spark plugs and set plug gap to 1.0mm(0.040). Use ROTUNDA RTTP tool KDT165 or equivalent to gap and adjust the plugs before installing. For Drivability concerns Refer to Powertrain Control/Emissions Diagnosis (PC/ED) manual. Engineering is currently investigating this concern. To assist with the investigation use the Report A Vehicle Concern link at the bottom of the Oasis report and submit a Global Concern Report (GCR). Continue to monitor OASIS for updates. |
2 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.