P0449 — EVAP vent valve / solenoid circuit

Code P0449 is a standard OBD-II diagnostic trouble code: EVAP vent valve / solenoid circuit.

In our record, P0449 is reported most often on Chevrolet, Hyundai and Saturn vehicles , against engine and electrical failure patterns , across 2008–2019 model years.

In ProblemsByVin's analysis of the NHTSA owner-complaint record, owners cite P0449 across 7 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 P0449 7 patterns

2019 Chevrolet Trax

engine — Cooling system failures and overheating

2011 Chevrolet HHR

electrical — Purge vent valve ground wire corrosion

2011 Hyundai Sonata

cruise control — Acceleration Hesitation and Jerking

2010 Chevrolet Impala

electrical — Engine power loss and reduced-engine-power message during driving

2010 Hyundai Sonata

engine — Persistent check engine light

2009 Saturn Aura

powertrain — Multiple Electrical and Control System Faults (Brake Lights, ESC, Traction Control)

2008 Chevrolet Trailblazer

engine — Evaporative Emission System Solenoid Fault

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 →