Question about 2005 Buick Terraza
No one can figure out what is wrong with it.
Posted by Anonymous on
P0449 is a problem in the electrical circuit for the purge solenoid. The computer is sensing that the circuit for the valve is bad. This could be a bad connection or the valve has no resistance. Check to see if the connector on the valve is tight an also that the connection are clean. Check the resistance of the solenoid to make sure it is not open. Check the wires to the solenoid. One has constant power, the other is a ground that is regulated by the computer so there is little to no value at rest. Cthere is a fuse that supplies power to the solenoid but it also supplies power to other components so if that fuse is blown, you would experience other issues.
Chech everything with either a 12 volt test light or a multimeter set to the 20V DC scale. Do not at anytime energize any of the wires. This could only cause greater problems.
Posted on Apr 16, 2015
DTC P0449 Evaporative Emission (EVAP) Vent Solenoid Control Circuit.
The control module detects that the commanded state of the driver and the actual state of the control circuit do NOT match.
Did they ( who ever checked out ) check the wiring an connectors for corrosion ? Did they replace EVAP canister vent solenoid valve ? Check all connections at the vent solenoid an the PCM !
Posted on Apr 16, 2015
a 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of.(from cars to computers, handyman, and even drones)
click here to download the app (for users in the US for now) and get all the help you need.
Posted on Jan 02, 2017
Tips for a great answer:
Apr 12, 2017 | 2009 Chevrolet Impala
Jan 07, 2016 | 2004 Chevrolet Chevrolet Impala
Sep 21, 2014 | 2009 Chevrolet Traverse
Aug 02, 2014 | 2002 Pontiac Grand Prix
Mar 22, 2014 | 2008 Chevrolet Trailblazer
Oct 22, 2013 | 2007 GMC Canyon Crew
Dec 06, 2012 | 1999 Chevrolet Malibu
Mar 19, 2015 | 2005 Buick Terraza
157 people viewed this question
Usually answered in minutes!
Step 2: Please assign your manual to a product: