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Service bulletins for the 2015 Subaru Forester

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

502 on file from NHTSA, as of 2026-10-19.

About P0300 on the 2015 Subaru Forester: what the code means, and the bulletins and recalls about the same components.

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By trouble code

Only bulletins with trouble code: P0300 are shown. Show all

Bulletins, newest first
07-112-16R2021-02-18. Service bulletin. ELECTRICAL SYSTEM. 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.
7112162020-11-16. Service bulletin. EQUIPMENT; ELECTRICAL SYSTEM:ALTERNATOR/GENERATOR/REGULATOR. 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.
07-112-16R2017-10-27. Service bulletin. ELECTRICAL SYSTEM:ALTERNATOR/GENERATOR/REGULATOR; ELECTRICAL SYSTEM. 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.
11-161-162017-10-27. Service bulletin. ELECTRICAL SYSTEM; ENGINE AND ENGINE COOLING. 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.
07-112-16R2017-09-14. Service bulletin. ELECTRICAL SYSTEM:ALTERNATOR/GENERATOR/REGULATOR. 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.
11-161-162016-12-27. Service bulletin. ENGINE. "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."

The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.