Someone told me that it could be from getting gas where they didnt seal the cap tightly. The blower fan resistor is located in the foot well of the passenger seat under the glove box. When I pulled the electrical connector off the valve the vacuum went away. One of those hoses goes to the engine, and the other comes from the charcoal canister. I have a 00silverado 5. Checked the code and got p455 large leak detected.
Registration required to view the forum attachments. If you want to advertise on this forum, email KappaPerformance at yahoo. On the other hand, since gasoline boils as low as 95 F, and evaporates at even lower temperatures, basically until it freezes, at some -50 F, depending on the exact blend. It was told that replacing the Canister Purge Valve should fix this problem, which I did. Also check the wires to the vent valve as the tend to break right around the connector going to the valve its self. If the light returns, have a mechanic check it out.
Did you get the gas cap from Chevrolet? You need to take your vehicle to a qualified repair shop an have it check out. If not, the light will come back on after you drive the car two drive cycles. Tubing connects the fuel tank, canister, and engine. There are a few clips that you need to find and remove. I replaced the valve and both issues went away for 2 weeks. Both lines are quick disconnect types.
Unplug the resistor and look at the metal contact points. Year, Make, Model, Engine, any recent repairs? I believe the purge valve is located by the throttle body, on the intake. Access to the sensor requires removal the the fuel tank. Those codes disappeared and the other three codes P04xx remained. Remove the two screws and pull the resistor down and out.
The taillights housing have tapered bayonets that secure the housing into the…. Is it possible that they may have unplugged something in the process of changing the air filter as it seemed that they had a struggle with it. Do some research before you pull the three connectors as they are easy to damage. During refueling, the charcoal canister captures any vapors in the escaping air. It also might not start at all at the gas station. Chevy Avalanche P0496 Causes There are many things that can cause the P0496 trouble code on the Chevrolet Avalanche.
Is the canister in good condition? Yes i am a single mother so i am trying to fix myself. Supporting Membership has many advantages. The purge valve sticking open is a common issue, but it could be caused by a failed canister. Richard- Please give us some vehicle information to help you out. Is there possibly some obscure sensor located somewhere that could cause this? The engine may start to run erratically, as well, due to the large vacuum leak you just created. I had the oil changed at a lube change place last week. That is: two starts, warm ups and shut downs.
So the eng light came on with code po442 which is a small evap leak. Gas cap was the first to be replaced a few months ago. All was well for the next couple of days and then the code showed back up. This evaporator and or the lines being restricted are the most common causes of engine code 0455 and gas cap light coming on. I have a code of evaporative emissions system high purge flow.
I have a 2009 Silverado with the 5. One of the most common trouble codes with the Chevy Avalanche is the P0496 code. I've done it to my 98 S10 with the same engine. I have codes P0420, P0442 and P0496. During idle there is vacuum with the hose disconnected.
No, there is however a fuel tank pressure sensor located on the fuel pump module. The camshaft actuator solenoid valve is located on the right side of the engine below the valve cover. The canister purge valve is the one that allows the engine to suck in fuel vapors to be burned. Checked codes and this time I had p0496. If this engine is the same as mine mine is a vortec 4 cyl.
Then, while the engine is running, the purge valve allows the engine to burn off any vapors caught in the canister. Purge is on or off - maybe knowing vehicle will help explain-. Once the bolt is out, twist the solenoid while pulling it at the same time to remove. New valve was stuck open again. But, this is definitely not where you want to start. . If you want to try and clear this code, find the radio code for your car and then disconnect the battery for 30 seconds.