P0300 on the 2015 Subaru Forester
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.
| 07-112-16R | 2021-02-18. Service bulletin. This bulletin provides a procedure for diagnosis and repair of DTC P0300 which may result from fluctuation of the alternator's current output outside of the specified limits. |
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| 711216 | 2020-11-16. Service bulletin. This bulletin provides a procedure for diagnosis and repair of DTC P0300 which may result from fluctuation of the alternator?s current output outside of the specified limits. |
| 07-112-16R | 2017-10-27. Service bulletin. New Alternator Assembly. This bulletin provides a procedure for diagnosis and repair of DTC P0300 which may result from fluctuation of the alternator?s current output outside of the specified limits. |
| 11-161-16 | 2017-10-27. Service bulletin. This bulletin announces the availability of new reprogramming files for optimizing the ECM to address the following customer concern: ? Rough idle after a warm engine restart. In rare cases, DTC P0300 may also be stored. |
| 07-112-16R | 2017-09-14. Service bulletin. 2.5L MODELS ONLY. This bulletin provides a procedure for diagnosis and repair of DTC P0300 which may result from fluctuation of the alternator's current output outside of the specified limits. |
| 11-161-16 | 2016-12-27. Service bulletin. "THIS BULLETIN ANNOUNCES THE AVAILABILITY OF NEW REPROGRAMMING FILES FOR OPTIMIZING THE ECM TO ADDRESS THE FOLLOWING CUSTOMER CONCERN: • ROUGH IDLE AFTER A WARM ENGINE RESTART. IN RARE CASES, DTC P0300 MAY ALSO BE STORED." |
6 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.