What is the problem when i have the code p 0449

code p 0306 is --misfire on no 6 cylinder ===causes injector wiring ---ht leads , coil
code p 0449 is EVAP purge valve --circuit malfunction ===causes --wiring--EVAP canister purge valve --ECM and code p 0068 is MAP ( manifold pressure )sensor ( mass air flow sensor (MAF)---throttle position correlation===causes --wiring--MAP/MAF sensor--mechanical fault
could be a common wiring harness plug connection or loose connections on the ECM

code p 0449 refers to evaporative emission (EVAP)system, vent valve ---circuit malfunction===causes --wiring ---EVAP cannister purge valve ---ECM
check the wiring for breaks , bad connections
replace the purge valve
the vent valve is part of the purge system of the EVAP system( fuel system)

0449 is the vent solenoid its near the fuel tank mounted to the frame .Follow the hose from the fuel pump it will be between the tank and the charcoal canister witch another hose will be going to drivers side rear.

use a code reader to reset the CPU

code 0449 evaporative emission control system vent valve solenoid circuit malfunction check your fuses as well as connections and power going to the solenoid see manual for location of valve

Hi.

P0449 means: evaporative emission (evap) canister vent solenoid valve, incorrect voltage at driver.

Check the evap. ventilation valve, wiring and and solenoid. The evaporative system is located under the vehicle near to the fuel tank.

Regards.

Ginko

I do not think canister, but a little bulb on or beside the canister is the problem. it seem to me i seen this on motorweek, on the garage part. hope this helps.

CODE PO449 - EVAP VENT SOLENOID CONTROL CIRCUIT MALFUNCTION CONDITION. FIRST CHECK EVAP SOLENOID FUSE.IF ALL IS GOOD EVAP VENT SOLENOID LOCATED ON A BRACKET NEXT TO FUEL TANK.

Most common problem for 0449, and 0455 on this truck is dust in evap vent valve causing valve to stick open and resulting in 0455
need to replace evap vent valve and clean dust from vent hoses

engine lght is on - lack of power