This can happen for multiple reasons and a mechanic needs to diagnose the specific cause for this code to be triggered in your situation. Our certified mobile mechanics can come to your home or office to perform the Check Engine Light diagnostic. This code may be seen with other EVAP system codes. The P DTC means that the evaporative emission control system vent valve or solenoid has a malfunction. Take note of the freeze frame data associated with the codes this is the conditions the vehicle was under when the malfunction set the Check Engine Light.
Uses an advanced scan tool to operate the EVAP functions and enables the vent valve to function, checking for proper operation. All components must be tested for proper operation thoroughly before they are replaced otherwise perfectly working parts may be replaced unnecessarily. P is an emissions control code and will cause the vehicle to fail OBD2 based emissions. Other than failing the emissions the fuel odor may bother some drivers.
This code should not prevent normal vehicle operation but should still be repaired ASAP.
P0446 Chevy Silverado
Advanced level scans are extremely helpful when diagnosing EVAP system codes. WIthout an advanced level scan tool these procedures can not be performed and diagnosis becomes much more difficult. YourMechanic offers certified mobile mechanics who will come to your home or office to diagnose and repair your vehicle. Get a quote and book an appointment online or speak to a service advisor at With YourMechanic you can skip the run series 1 answer key auto shop altogether.
They send certified and screened mechanics straight to your door and enable you to save big on car repair and maintenance. Cost of diagnosing the P code. No more waiting rooms! Our mechanics will come to you to diagnose and fix the P code. Recent Check Engine Light is on Inspection reviews. Excellent Rating. Average Rating 4. Number of Reviews 5, Rating Summary. Amir 15 years of experience. Request Amir. Amir was on time and explained the needed repair thoroughly.
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Nicholas 10 years of experience. Request Nicholas.Is your Chevy Silverado check engine light come on? Did you get an Evap code P or P? Maybe even the auto parts store told you to try a new gas cap and the light is still on? Evap codes generally do not effect your vehicle's performance but will impact your vehicle's emissions and could lead to additional issues down the road.
We are committed to maintaining a safe and healthy workplace for our employees and helping our customers to do the same. We want to share with you the actions we are taking to help protect our employees and customers. There a few main causes for evap codes in your Chevy Truck: - Gas caps can be a likely culpirt if left on loose or the seals have worn out - your vehicle's evap system is pressurized if the cap doesn't seal - Evap Canisters charcoal canisters these are generally the culprit if gas cap does not clear codes - Leak in the system - we can use a smoke machine to find the pinhole leak to get your vehicle fixed correctly.
Categories: Check Engine Light. Tags: evap code. We are frequently sanitizing all shared surfaces in our office. We can arrange vehicle drop-off through our night drop box, so you do not have contact with any of our employees. We can communicate with you regarding vehicle repairs and recommendations through text messaging, email or telephone.
How to fix Chevy Silverado 2001 trouble code p0449?
We can arrange a vehicle pick up outside the building with a phone in payment option. Stay Safe and Healthy!Check engine light is on and stays on. Had it diagnosed and was told the fuel evaporator canister had to be replaced.
Already replaced the purge valve. Did more research, this is a common problem. Was annoying to have the check engine light on all the time. I read on one of the forums that these can fail if you top up your gas tank while filling up Way cheaper and has been great ever since. The dealership has been very kind and accommodating but I feel that General Motors Corporation has shifted their responsibility completely to the dealership and us the customer.
Now exactly 14 days after the repairs were completed and paid for by the customer, the check engine line is on AGAIN. Took truck back to dealership this time the code is P Next Complaint to follow this one. Third time at dealership for same problems. Code P which states the following things: Evap leak, Air Flow Condition, does not hold vacuum, defective or loose gas cap, evap canister or hose cracked or not connected, Purge Vent Solenoid Defective or a Vacuum leak at engine. Very skeptical this is the fix, as we have already done all of this.
Now even worse is that I have to surrender my non-GM vehicle this is the wife writing this to my husband to bring me to work so he can take my vehicle to work and I don't like others driving my vehicle at all, not to mention that now I have to bum a ride again back to the dealership to pick the truck up. The other MORE aggravating thing is that we DO NOT ever take the truck anywhere together anymore, we always use my car and the reason for that is that we do not want to be stranded without one of us being available to rescue from the side of the road.
Plus we do not want to continue to have to do this every 30, miles. It's ridiculous and General Motors Corporation does not want to take responsibility and stand behind their product. Last thing is, I was told by a GM Certified Mechanic that the Silverado had a faulty design change on the location and mounting of the solenoid and they know about it and they know how to repair it, but did nothing and continues to do nothing to assist the customers with this repeatative problem.
It is one thing to have a flawed design or defective parts and stand behind them, but it is totally different when they know and refuse to make good on it. Took to dealership and was told the truck was miles over warranty for this problem. So apparently Chevolet knew of this problem but would rather the consumer pay for the modification than admit their engineering mistake and take care of it themselves.The Evaporative Emission Control EVAP System seals the fuel system of the vehicle in order to prevent fuel vapors from the fuel tank and fuel system from escaping into the atmosphere.
This is important because fuel vapors contain a variety of hydrocarbons. Hydrocarbons form smog when they react with air and sunlight. Gasoline evaporates very quickly, so if the fuel system is open to the atmosphere, a vehicle can pollute 24 hours per day without even being turned on. When the trouble code P is set, this is an indication of the EVAP system vent valve solenoid malfunctioning which results in more hydrocarbons being expelled into the atmosphere.
Code P does not pose any serious danger to the driver or the vehicle and there are no drivability issues that may occur. However as the case with all Check Engine Light codes, it should be fixed as soon as possible to prevent any further damage to your vehicle. Replacing the gas cap without checking the EVAP vent valve solenoid.
Po is in reference to the electrictal part of the evap system ohm out the vent valve and u will likely find the problem. I first replaced the solenoid located at the fuel tank The problem then became errant instead of constant I chased wires to bulkhead connection below the driver-side and found this connection severely corroded Had to removed rivets and replace both side of all 3 plugs. Fault corrected. I replaced mine. GM says that the location between the gas tank and the spare tire is the problem.
They say the canister gets dirty too easy. Their solution is to relocate the canister between the cab and the bed. Would the evap system cause the truck while driving down the road act like its misfiring and wanting to stall. Not the fuel cap, but he selenoid can, also check the fuel presure sensor on the top of the fuel pump.
Yes No A very common issue with the Chevy Silverado is the P code. P deals with the evaporative emissions control system. It often appears with, or is related other codes, such as PPand very often P P is normally not an immediate threat to the drive-ability of your Silverado.
Also, a really good scanner will help you identify whether or not the valve is operating correctly. Most shops have them. Otherwise, this article is meant to show how you can diagnose the problem yourself.
This means that regardless of which make or model of vehicle, the code will mean the same thing Silverado or not, as long as it was manufactured after P indicates that the valve or solenoid circuit that controls the evaporation system is not functioning properly.
The EVAP system cycles fuel vapor from the gas tank into the intake manifold, a charcoal canister, or directly into the air depending on the model of vehicle. When this system malfunctions, the fuel vapor is not being dealt with properly.
The ECM Engine Control Module of the vehicle has detected that there is a fault in the circuit which controls the vent that releases the fuel vapor from the system. This will be followed by the service engine soon light. P code will typically not be accompanied by any noticeable symptoms other than the smell of gas and the service engine soon light.
You may notice the slightest dip in fuel economy as well.
Chevy Silverado Trouble P0452 What Needs to Be Replaced?
The EVAP system deals directly with fuel vapors. There are many things that can cause the P trouble code to trigger in your Chevy Silverado. Here are the most common problems that will throw the code along with a great video on the whole process:.
A mechanic has a wide range of instruments at his or her disposal to diagnose what would be causing the P in your Chevy Silverado. Here are the most common things that are done to diagnose the code:. Still having trouble? Of all the items listed above, it would be wise to start with the gas cap and work your way to the fuel tank, since the gas cap is far and away the easiest and least expensive items to replace on here. Good luck figuring out what is causing your Chevy Silverado to throw the P code.I need to know what this code is and what needs to be fixed.
Thank you. The first thing we recommend doing is ensuring your Silverado's gas cap is secure and driving your truck for miles to see if the light will turn off. If at any time your trucks gas cap is loose, trouble code P will be detected. If you've ensured the gas cap is not the problem.
Inspect the Fuel Tank Pressure Sensor's wiring harness. If the harness is disconnected or the sensor wires frayed, a trouble code P will be triggered.
If the sensor is found to be defective, replace it, clear the ECU trouble codes, and drive your truck for approximately miles in order to "complete" the emission monitors. Your truck will then be ready for a smog check retest. No smog check? No problem. Pay your DMV renewal fees now and avoid penalties! NeedTags - OL California authorized online vehicle registration service provider.
All Rights Reserved. Smog questions might be posted on our online forum to assist other vehicle owners. No personal information is published.EVAP Code P0449
Which Type Should I Choose? Join the community and post your questions. Ask-A-Tech right now! Failed Smog Test.One of the most common trouble codes with the Chevy Silverado is the P code. P Indicates that there is a fault in the evaporative emission control system.
It often appears with other codes, such as P, P, or P P is normally not an immediate threat to the drive-ability of your vehicle. It is often accompanied by P P is another common trouble code that accompanies P P code will typically not be accompanied by any noticeable symptoms. The service engine soon light will come on, but that is usually about it. You might not very likely notice a slight decrease in fuel economy. P may also cause a slight gas smell.
This is due to it being related to the system that deals with fuel vapors. This means that regardless of which make or model of vehicle, the code will mean the same thing Silverado or not. The code technically stands for:. The EVAP system captures all fuel vapor from the fuel tank and sends them to the engines intake in order to be ignited in the normal combustion process.
There are many things that can cause the P trouble code to trigger in your Chevy Silverado. Here are the most common problems that will throw the code:. A mechanic has a wide range of instruments at his disposal to diagnose what would be causing the P in your Chevy Silverado. Here are the most common things that are done to diagnose the code:.
Of all the items listed above, it would be wise to start with the gas cap and work your way to the fuel tank, since the gas cap is far and away the easiest and least expensive items to replace on here. Good luck figuring out what is causing your Chevy Silverado to throw the P code. We hope this helps. If there is anything that you feel like you could add, please feel free to leave a comment below. The code technically stands for: Evaporative Emission Control System — Vent Control Circuit Malfunction The EVAP system captures all fuel vapor from the fuel tank and sends them to the engines intake in order to be ignited in the normal combustion process.
There are a few clips that you need to find and remove. Evap System Hose — The hose that carries the fuel vapor from the fuel tank to the intake manifold can begin to leak. This will cause the P code.
Look for either a tear or hole in it. Faulty Charcoal Canister — The charcoal canister is often the cause of P Fuel Tank Sending Unit — It is possible for the fuel tank sending unit to go bad.
This can mess with line pressure and throw the code. Fuel Cap — A bad fuel cap can cause the code to be thrown for sure. If you are getting that message, plus a P, it may save you a ton of time and money to replace the fuel cap and see if it goes away. Fuel Filler Neck — There is often a gasket where the fuel filler neck connects with the gas tank.
This gasket can dry out, especially with vehicles that spend their time in dry climates.