P0366: 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 P0366 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

7 complaints filed with NHTSA mention P0366, 7 of them since 2015, across 7 different models. The component owners most often filed it under: engine.

Manufacturer service bulletins that name P0366

20 technical service bulletins and manufacturer communications filed with NHTSA mention P0366, from 6 makes. A bulletin means the manufacturer has documented a known cause or a fix procedure for that model. Examples:

  • CHEVROLET MALIBU (2022), bulletin 10226360: This Preliminary information communicates to the dealers information related to a MIL on with DTC'sP0365 Exhaust Camshaft Position Sensor Circuit / DTC P0366 Exhaust Camshaft Position System Performance stored current or…
  • GMC CANYON (2015, 2016, 2017, 2018), bulletin 10235583: This technical bulletin provides a procedure to locate and repair a possible short in the wiring harness located at the camshaft cover or the cylinder head to correct customer concerns of Lack of Power, Reduced Power Dis…
  • CHEVROLET COLORADO (2015, 2016, 2017, 2018), bulletin 10235583: This technical bulletin provides a procedure to locate and repair a possible short in the wiring harness located at the camshaft cover or the cylinder head to correct customer concerns of Lack of Power, Reduced Power Dis…
  • BUICK CASCADA (2017, 2018), bulletin 10190333: Malfunction Indicator Lamp (MIL) Illuminated - DTC P0366 and/or P0014 Condition Some customers may comment that the MIL is illuminated. The technician may find one or more of the following DTCs set: P0366 P0014 Cause Thi…
  • CHEVROLET AVEO (2009, 2010, 2011, 2012), bulletin 10113354: This Preliminary Information communication provides information to the technician about vehicles that have a Service Engine Soon Malfunction Indicator Lamp on. Technician will find Diagnostic Trouble Code P0341 and or P0…
  • 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…

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.