P3400 — Cylinder deactivation system (bank 1) — Honda VCM, GM AFM/DFM, Chrysler MDS

Code P3400 is a standard OBD-II diagnostic trouble code: Cylinder deactivation system (bank 1) — Honda VCM, GM AFM/DFM, Chrysler MDS.

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In our record, P3400 is reported most often on Honda and Chevrolet vehicles , against engine and powertrain failure patterns , across 2008–2016 model years. Honda alone accounts for 93% of them.

In ProblemsByVin's analysis of the NHTSA owner-complaint record, owners cite P3400 across 14 vehicle failure patterns. Diagnostic codes in complaints are reported by owners and are unverified — they point to where this code shows up, not a confirmed diagnosis. Open a page below for the full pattern (symptoms, mileage, repair costs owners cite).

Vehicles where owners report P3400 14 patterns

2016 Chevrolet Silverado

engine — Lifter and Camshaft Failure (AFM/DFM system)

2016 Honda Odyssey

engine — Piston Ring Deterioration & Oil Consumption

2014 Honda Odyssey

engine — Piston ring wear and oil passage into cylinders

2013 Honda Pilot

powertrain — Cylinder 1 misfire and VCM/oil contamination failure

2012 Honda Accord

powertrain — Engine rough running and misfire

2012 Honda Odyssey

powertrain — Loss of engine power and hesitation on acceleration

2011 Honda Accord

engine — Severe Power Loss and Engine Misfiring – Stuck Solenoid / Cylinder Deactivation Failure

2011 Honda Pilot

engine — Excessive oil consumption and spark plug fouling

2010 Honda Accord

engine — Check engine and dashboard warning lights with poor diagnosis

2010 Honda Odyssey

engine — Excessive oil consumption and cylinder misfires

2010 Honda Accord Crosstour

engine — Cylinder misfire from oil-fouled spark plugs

2010 Honda Accord Crosstour

powertrain — Excessive Oil Consumption with Internal Leakage

2009 Honda Odyssey

engine — Excessive oil consumption with fouled spark plugs and misfires

2008 Honda Odyssey

engine — Excessive Oil Consumption / Burning

Codes are pulled from what owners wrote in their NHTSA filings — they're allegations, not a shop diagnosis. Always confirm with a live scan. Browse all diagnostic codes →