P0303 on the 2013 Subaru Impreza
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.
| 11-125-12 | 2017-03-06. Service bulletin. DTCS P0365, P0366, P0390 AND P0391 MISFIRE DTCS P0301, P0302, P0303 AND P0304 |
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| 11-124-12R | 2017-03-01. Service bulletin. DIFFICULTY STARTING, ROUGH IDLE, CAM POSITION OR MISFIRE DTCS P0301, P0302, P0303 OR P0304 DTCS P0340, P0341, P0345 OR P0346 |
| 11-130-13R | 2017-01-31. Service bulletin. "DIFFICULTY STARTING, ROUGH IDLE, CAM POSITION OR MISFIRE DTCS P0340, P0341, P0345, P0346, P0365, P0366, P0390, P0391, P0301, P0302, P0303 OR P0304 - THIS BULLETIN PROVIDES INSPECTION AND REPAIR PROCEDURES FOR INTAKE AND EXHAUST CAMSHAFT POSITION-RELATED AND/OR ENGINE MISFIRE DTCS FOR THE FA AND FB ENGINE-EQUIPPED MODELS LISTED ABOVE." |
3 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.