He wasnt much help when it came to telling me what that code meant. Clear the code and keep driving. The first time we got these codes we had our mechanic look at it and they replaced the Vent Solenoid. Chevy Avalanche P0496 Causes There are many things that can cause the P0496 trouble code on the Chevrolet Avalanche. Here are some of the most common. The hose is simply used to connect the two new pieces together. I just want to make sure I can pass smog.
What happens is that the Fuel Vent Solenoid becomes clogged with dirt and dust. So you should chech it on our car models. Align the alignment holes between the switch and the shift lever. During refueling, the charcoal canister captures any vapors in the escaping air. I have a code P0496 on my 2003 sierra with a 5. The purge valve sticking open is a common issue, but it could be caused by a failed canister. The new one should be a two piece set up that will replace the current one piece set up.
Fortunately, checking the purge valve is easy. It would also smell of gas but when id look for the leak, I could never find one. Bench test the new valve and make sure the connector and hoses are properly seated. You can disconnect it to make sure. Fuel tank vapors are allowed to move from the fuel tank, due to pressure in the tank, through the v P0496 code. A poster on another board has the same issue and symptoms. .
If the diagnostic reports a failure on the second consecutive ignition cycle, the control module records the operating conditions at the time of the failure. Thx I had a similar problem where my truck was throwing the p0446 code and one other can't remember sorry. The engine will rev up and down trying to find the proper idle speed. Refer to Fuel Tank Pressure Sensor Replacement. At this point the purge valve should be closed.
Vapor Canister Purge Valve— The most common culprit with the P0496 trouble code and the Chevy Cruze is going to be the vapor canister purge valve. There may be more than one line connected to the purge valve, depending on if the valve is connected directly to the intake manifold or not. YourMechanic offers certified mobile mechanics who will come to your home or office to diagnose and repair your vehicle. I was able to climb underneath it okay. Even though there are few signs and symptoms of this type of problem in the vehicle, it is still important to get the problem fixed as soon as you are aware of it. I was recently getting cylinder misfire codes for 3 out of 4 cylinders! I have driven about 15 miles since changing it.
If you can feel engine vacuum with your fingertip on the purge valve inlet port, this means the purge valve is stuck open. 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. Fuel Tank Pressure Sensor— If the fuel tank pressure sensor has gone bad, it can cause all sorts of problems, including the P0496 code. At ten years of age, you may have corrosion and sticking in the vent valve, which would cause problems with purging. I have been doing some research. But, this is definitely not where you want to start.
All was well for the next couple of days and then the code showed back up. But, this is definitely not where you want to start. Fuel Cap— A bad fuel cap can cause the P0496 code to be thrown for sure. In case you find flakes of charcoal, this could mean the charcoal canister has leaked or is leaking, and will need to be replaced. Here are the most common problems that will throw the code. Or could it have been a faulty replacement? The most common problem is far and away the first one listed below.
The engine will rev up and down trying to find the proper idle speed. I have a 2011 chevy cruze. It was a bit tight, but I am pretty slender and limber. For me it became so bad that I could hardly pump gas. The control module records the operating conditions at the time the diagnostic fails. Fuel Tank Pressure Sensor— If the fuel tank pressure sensor has gone bad, it can cause all sorts of problems, including the P0496 code.
It looks like a black plastic can with a rubber hose and an electrical plug on it. Also, make sure you are using a good factory gas cap. It is best to take them into a mechanic to have them dealt with properly to make sure that the vehicle is in good condition. Common mistakes when diagnosing the P0496 code One of the most common mistakes made during the vehicle diagnosis is believing that the problem always lies within the evaporative emission control system components. Common Misdiagnosis Evaporative emission control system components are often replaced in error when a vacuum leak is present or the fuel cap is not properly tightened. Observe the fuel tank pressure sensor in H2O with a scan tool. With the replacement part, it will mount on the same clip by sliding it on the same way the old one came off, and the other new part can be attatched anywhere you like via a zip tie.
Wiring— It is possible for shorts in the wiring harness leading to the Vapor Canister Purge Valve has gone bad. I have zero knowledge about cars and although Ive read this article many times over, I still dont understand what is wrong with my car. They changed out the air filter and now I noticed the check engine light is on. Yes i am a single mother so i am trying to fix myself. Upon start up, car ran great. Could this be the cause of code? P0496 Chevrolet Possible Solution: Indicator and headlight bulbs need regular maintenance for them to keep functioning properly. Thanks for all the info.