P0346: owner reports and bulletins

Powertrain (generic, all makes). We haven't written the explanation for this code yet. Below is what owners and manufacturers have filed with NHTSA.

Got P0346 on your scanner? Tell the mechanic your year, make, model and any symptoms and you'll get the likely cause and what to check first. Ask about this code.

What owners report to NHTSA

4 complaints filed with NHTSA mention P0346, 3 of them since 2015, across 3 different models. The component owners most often filed it under: power train.

Manufacturer service bulletins that name P0346

11 technical service bulletins and manufacturer communications filed with NHTSA mention P0346, from 2 makes. A bulletin means the manufacturer has documented a known cause or a fix procedure for that model. Examples:

  • SUBARU FORESTER (2013, 2014), bulletin 10090275: REPROGRAMMING FILE AVAILABILITY FOR DTCS P0341 AND P0346
  • SUBARU IMPREZA (2012, 2013, 2011), bulletin 10089963: "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…
  • SUBARU CROSSTREK (2012, 2013), bulletin 10093403: DIFFICULTY STARTING, ROUGH IDLE, CAM POSITION OR MISFIRE DTCS P0301, P0302, P0303 OR P0304 DTCS P0340, P0341, P0345 OR P0346
  • SCION FR-S (2013), bulletin 10131915: Some 2013 model year FR-S vehicles may exhibit intake and/or exhaust camshaft position sensor related and/or engine misfire DTCs (P0340, P0341, P0345, P0346, P0365, P0366, P0390, P0391, P0301, P0302, P0303, and P0304) du…

Sources: NHTSA Office of Defects Investigation complaint database and manufacturer communications file, snapshots September 2026. A complaint or bulletin that mentions a code is a report about that vehicle, not a statement that the code has one cause.