Question about 2006 Chevrolet Uplander
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Posted on Jan 02, 2017
SOURCE: OBD code P0449
that dtc is for evap system vent valve solenoid circuit. the computer is having a problem opening or closing that solenoid (a kind of electric motor that in this case moves to allow or prevent evaporated fuel to leave a canister that captures it) and it's letting you know that it has this problem because proper operation of that system is important to the emissions level of the vehicle. it also contributes to better fuel economy so you probably do want to fix it. the quick and easy way to deal with it is to replace the evap canister vent valve and hope that it wasn't the wires in between that part and the enigne computer that were causing the problem. your tahoe is new enough that this is probably a good guess, the wires are probably good. just a tip, when you put fuel in your vehicle stop when the pump quits the first time. if you keep pumping fuel into it you can fill the evaporative canister and evap system with fuel and the little electronic parts aren't made to take being submerged in raw gasoline. hope that helps
Posted on Jun 04, 2009
p0449 is a EVAP code here is something to check had a few of these inspect the wiring harness coming out of the right rear floor pan area at connector The harness is located in front of the EVAP canister, and will usually show signs of wear. Make sure that you inspect all the wiring carefully and make all necessary repairs
hope this helps
Posted on Jan 17, 2010
SOURCE: Fault codes
P0449 - Evaporative Emission (EVAP) Vent Solenoid Control Circuit
P0481 - Cooling Fan Relay 2 Control Circuit
It is not uncommon for the canister vent solenoid to go out.More then likely this is the correction for this issue.The second problem could be addressed by verifying that the second fan is not coming on and whether or not the fan is receiving any power.Turning the a/c on normally forces the second fan to come on.If it does not a wiring diagram may be necessary to check different points for power.Would start at the relay itself to verify power is going to and through the relay. You can also swap an identical relay with the fan relay just to test if the relay itself is malfunctioning.If it works after that then you need a replacement relay for that circuit.If it still does not work you will need to find out where the power stops flowing in that circuit.
Posted on Jun 05, 2010
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