I replace gas cap and evap vent solenoid and stel have c ad po449?

DTC P0449: Evaporative Emission (EVAP) Vent Solenoid Control Circuit
Do you know how to do electrical testing ?

Do P0449 EVAP Vent Valve Solenoid Circuit Malfunction EVAP Vent Solenoid Control Circuit P0449 repair GM

Google the location & a picture & replace yourself

Has to be near the fuel tank

PO449 is the Evap Vent Solenoid

PO 300 is random cylinder misfires maybe from the
extra air, when the evap purge runs

po449-- Evaporative Emission Control System Vent Valve/Solenoid Circuit, 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, the best thing to do is have a certified mechanic check it out.for proper diagnosis Good-Day!

PO449-- Evap Vent Valve/Solenoid Circuit Malfunction

PO441--Evap Purge Valve Incorrect Flow
PO 443,444,445 Purge Control Valve Issues


There was no reason to change the gas cap or
purge control valve

Didn't Google the code & use it correctly to diagnose
the problem

The PCM has determined that a malfunction exists in the electrical circuit for the vent valve/solenoid in the evaporative emission control system.

Definition:
EVAP (Evaporative Emission System) purge/vent solenoid circuit condition

Explanation:
The solenoids and system wiring are monitored for opens or shorts

Probable Causes
1- Purge or vent solenoids defective
2- Check connevtor and wiring
3- Fuel saturated vapor canister
4- Failed EVAP vent solenoid

Your Po449 code means: Evaporative Emission (EVAP) Vent Solenoid Control Circuit. Check to see if anything on you EVAP system has gotten disconnected and make sure that none of your hoses have gotten old and bridle or have holes. If everything looks ok, you probably have to replaced the Vent Solenoid Valve, which is located on the EVAP canister.

Hi there:
The DTC P0449 fault code is one of two things 90 percent of the time... either your gas cap is not sealing or your evap vent solenoid is not sealing either.


The code means you have a large evap leak. The evap solenoid is locate near or beside it and has a electrical connector that goes to it. It is either round or square



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P0449 control vent valve/solenoid circuit malfunction, This code necessarilly deal with replacing the vent solenoid it about the circuit,the evap vent solenoid circuit may have rub through on the frame (located on the back of the fuel tank),it can also be the connector,the vent solenoid itself,or the connector

CODE PO449 - EVAP VENT SOLENOID CONTROL CIRCUIT MALFUNCTION.SOUND LIKE EVAP VENT SOLENOID HAS FAILED OR A BLOWN EVAP VENT SOLENOID FUSE.

CODE PO449 -EVAP VENT SYSTEM PERFORMANCE CONDITION.POSSIBLE CAUSES. VENT SOLENOID CONTROL CIRCUIT IS OPEN OR SHORTED TO GROUND OR.VENT SOLENOID CONTROL CIRCUIT IS SHORTED TO SYSTEM POWER B+.OR VENT SOLENOID POWER CIRCUIT IS OPEN TEST THE ENG 1 FUSE.OR VENT SOLENOID IS DAMAGE OR HAS FAILED.OR PCM HAS FAILED.