Possible causes
– Vacuum leaks, damaged hoses or improper routing
– EVAP system – Check fuel cap, canister, valves or components
– Faulty purge or vent solenoids
– Check connector and wiring
– Fuel saturated vapor canister
– Failed EVAP vent solenoid
– EVAP system – Check fuel cap, canister, valves or components
– Faulty purge or vent solenoids
– Check connector and wiring
– Fuel saturated vapor canister
– Failed EVAP vent solenoid
When is the obd code mean?
The Engine Control Module (ECM) has determined that a malfunction exists in the electrical circuit for the vent valve/solenoid in the evaporative emission control system.
Symptoms
– Engine Light ON (or Service Engine Soon Warning Light)
P0449 PONTIAC OBD Code Description
The Engine Control Module (ECM) monitors the Evaporative Emission System (EVAP) Vent Valve/Solenoid system wiring for opens or shorts.
PONTIAC Related P0449 code
2006 PONTIAC SOLSTICE Electrical System:wiring:front Underhood
2007 PONTIAC SOLSTICE Electrical System:wiring:front Underhood
2008 PONTIAC SOLSTICE Electrical System:wiring:front Underhood