P0446 gm

in this video I will share with you how to diagnose and Repair the Root cause of a P0446 on a Chevy Impala

P0446 gm. What is a P0449 on a Chevy Silverado or GMC Sierra? A P0449 Code is an “ Evaporative System Vent Control Circuit Malfunction .” This means the onboard computer (ECM) is seeing a problem in the EVAP system.

Jul 22, 2021 ... Very well could be the sensor. Those evap solenoids can act funny as well. Sometimes they will stick open, sometimes closed, and sometimes just ...

- The TSB for 1999 Toyota Corolla suggests replacing the ECM with an updated part as a repair for the diagnostic trouble code P0446. In some GM cars, a bad fuel tank pressure sensor also could cause the code P0446. - In Mazda Tribute and Mazda 6, the stuck open purge valve (solenoid) could cause the code P0446 or other EVAP codes. Yes, P0440, P0441, and P0446 codes are all related to the evaporative emission control system in a Chevy S10. The P0440 code indicates a general issue with the system, while the P0441 code signals a problem with the EVAP system’s purge flow, and the P0446 code is related to vent control issues. While these codes are distinct, they all …Conclusion. P0446 is a diagnostic trouble code (DTC) associated with a vehicle’s evaporative emissions control system. It signifies an issue in the vent control circuit in your Chevy Avalanche’s EVAP system, which prevents fuel vapor from being released into the atmosphere. A prevalent issue with the Chevy Avalanche is the P0446 code.The ECM does tests to check for leaks in the EVAP system when the vehicle is off. If the EVAP system fails to maintain proper pressure during this test, the P0446 code will appear. Similarly, the code will also come up if the ECM cannot control the vent valve. Symptoms Some of the most common symptoms for the P0446 Chevy code are:To fix the automobile fault code p0446, first, check the possible causes mentioned above. Then, visually inspect the wiring harness and connectors related to the issue. Look for any damaged components and check for broken, bent, pushed out, or corroded connector pins. The estimated repair time for this fix is 1.0 hour.Aug 7, 2018 · Conclusion. P0446 is a diagnostic trouble code (DTC) associated with a vehicle’s evaporative emissions control system. It signifies an issue in the vent control circuit in your Chevy Avalanche’s EVAP system, which prevents fuel vapor from being released into the atmosphere. A prevalent issue with the Chevy Avalanche is the P0446 code. The P0496 code indicates that there’s an incorrect amount of intake vacuum flow occurring in the car’s EVAP system. Any time this vacuum is higher than what the computer determines is appropriate, the codes will be set. While this code can occur with all brands, it appears to be most common with GM vehicles.2004 chevy silverado, code P0446: (EVAP) vent control circuit malfunction. Recently had code P0442, found and replaced a - Answered by a verified Chevy Mechanic ... GM has released a bulletin where they have you install a filter after the valve is replaced to prevent this issue from occurring again. It can cost around $400 to have this repair ...

A prevalent issue with the Chevy Venture is the P0446 code. This code corresponds to a specific number obtained when connecting your Venture to an OBDII scanner. A faulty vent control valve most commonly causes P0446. Table of Contents Definition Symptoms Causes Diagnosis How to Fix P0446 Definition P0446 is a …Help support the channel and become a patron.https://www.patreon.com/squarebodystuff Trouble codes P0442 & P0446 and fuel filler issues on our 2005 Chevy Tah...P0446 Definition. P0446 is a standard OBDII trouble code, applicable to any make or model of vehicle, whether it’s a S10 or not. Here’s its technical definition: P0446: Evaporative Emission Control System → Vent Control Circuit → Malfunction. In layman’s terms, P0446 indicates a problem with the EVAP system vent control valve. OBD-II Code P0446 is defined as a Evaporative System Vent Control Circuit Malfunction. The evaporative control (EVAP) system captures any raw fuel evaporating from the fuel storage system (e.g. the fuel tank, filler neck, and fuel cap). Under precise operating conditions—dictated by engine temperature, speed, and load—the EVAP system stores ... General Motors (GM) is an iconic American automobile manufacturer that has left an indelible mark on the automotive industry. With a history spanning over a century, GM has consist...27 Aug 2009 ... Recently, I decided to try to resolve the issue and replaced the canister purge valve (ACDelco: 214-1105 GM Original Equipment Vapor Canister ...This is a common issue that stumps a lot of people - the dreaded Chevy P0446 code. This code causes folks to think new charcoal canisters, vent valve solenoi...

The P0446 code indicates that there is a problem with the evaporative emission control system. This system is responsible for controlling the release of vapors from the fuel tank. The P0446 code may be caused by a failed EVAP canister, a blocked EVAP vent hose, or a leak in the EVAP system. If you own a Chevy and your check engine light is on ...21 Dec 2016 ... 26 - GM P0446 Vent System Performance-Diagnose & Fix it Right the First Time! ... 2014 Chevrolet Silverado code p0446. dennis ranck•36K views · 10 .... What is a P0446 Code? Better yet, what the heck is a Evaporative Emission System Vent Control Circuit? Well I ran into this problem with my 2007 Chevrolet Ta... P0446 is a diagnostic trouble code (DTC) associated with a vehicle’s evaporative emissions control system. It signifies an issue in the vent control circuit in your Chevy Express’s EVAP system, which prevents fuel vapor from being released into the atmosphere. A prevalent issue with the Chevy Express is the P0446 code.

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18 posts · Joined 2013. #6 · Feb 1, 2014. I have an 05 that was getting P0446. Cleaned the filter on the valve and it helped for a while. Code came back, so I got the updated part with the remote filter and installed that along with a new charcoal canister. (165000 miles on the truck). Now its throwing the code again, but only last tank was ...The My GM Rewards Card offers high earning potential, but it likely only makes sense if you want to redeem your points toward GM-related purchases. We may receive compensation from...It’s worth noting that code P0446 is more common on older automobiles, especially those made by domestic manufacturers such as GM. Evaporative Emission System Vent Control Circuit. One of your engine’s strategies to control dangerous emissions is the evaporative emission system vent control circuit. It stops fuel vapors from escaping into ...The fault code P0446 in the 2004 Chevy Silverado means that the computer has detected an electrical issue within the EVAP system vent control. The ECM sends a signal to the vent control valve to purge the gas vapors from the charcoal canister and directs them to the engine. When the P0446 fault happens, they vapors arent being …General Motors (GM) has always been at the forefront of automotive safety, constantly innovating to provide drivers and passengers with the highest level of protection on the road....

Here are a few ways to fix the code P0446. Replace the EVAP system hoses. Repair or Replace the fuel tank. Replace the charcoal canister. Use a proper or new gas cap. Replace faulty vent valves. JamesL Davis. James is a certified auto technician specializing in commercial vehicles.Feb 9, 2022 · There are a couple of common causes for the P0446 code. The most common is a damaged or missing gas cap. Other common causes include a faulty EVAP canister vent control valve, a damaged fuel tank filler neck, cracked or punctured EVAP hoses, a damaged carbon canister, a defective fuel tank, and bad electrical connections. In recent years, the automotive industry has witnessed a significant shift towards electric and autonomous vehicles. One company that has been at the forefront of this revolution i...Aug 13, 2018 · P0446 is a diagnostic trouble code (DTC) associated with a vehicle’s evaporative emissions control system. It signifies an issue in the vent control circuit in your GMC Yukon’s EVAP system, which prevents fuel vapor from being released into the atmosphere. A prevalent issue with the GMC Yukon is the P0446 code. To fix the automobile fault code p0446, first, check the possible causes mentioned above. Then, visually inspect the wiring harness and connectors related to the issue. Look for any damaged components and check for broken, bent, pushed out, or corroded connector pins. The estimated repair time for this fix is 1.0 hour.To diagnose the P0446 2016 GMC Sierra code, it typically requires 1.0 hour of labor. The specific diagnosis time and labor rates at auto repair shops can differ based on factors such as the location, make and model of the vehicle, and even the engine type. It is common for most auto repair shops to charge between $75 and $150 per hour.06MonteSS 2014 Camaro 2SS/RS - LS3, 6-speed manual, short-throw performance shifter, NPP dual-mode performance exhaust, 1LE front splitter, ZL1 rockers, Z28 Rear Spoiler, all paint-matched Red Rock Metallic, Custom paint-matched Bowtie emblems, Custom painted SS emblems, BMR strut tower brace, CAI - Cold Air …Once a calibrated vacuum level has been reached, the ECM commands the EVAP purge solenoid valve Closed and the EVAP vent solenoid valve Open. The ECM monitors the Fuel Tank Pressure (FTP) sensor for a decrease in vacuum. If the vacuum does not decrease to near 0 in H2O in a calibrated time, this DTC sets. P0446 Buick …If the ECM attempts to activate the vent control solenoid but detects incorrect voltage feedback or incorrect vacuum or pressure feedback, it will lock out EVAP function, set a diagnostic trouble code (DTC), and illuminate the malfunction indicator lamp (MIL). DTC P0446 is defined as “Evaporative Emission (EVAP) Vent Control Circuit ...A trouble code P0446: Evaporative Control System Vent Valve Performance means that the EVAP vent solenoid is not allowing ambient air into the EVAP charcoal canister. The EVAP vent solenoid's job is to allow ambient air into the charcoal canister so that fuel vapors can be purged from the activated carbon in the EVAP canister. temp.xml. Bulletin No.: 15-06-04-002. Date: Apr-2015. Subject: Malfunction Indicator Lamp (MIL) Illuminated, Fuel Tank Hard to Fill, DTCs P0442, P0446, P0455 or P0449 Set. Models: 2011-2013 Chevrolet Silverado. 2014 Chevrolet Silverado 1500. 2014 Chevrolet Silverado 2500/3500. 2000– 2003 GMC Yukon, Yukon XL with 4.8L, 5.3L, 6.0L, 8.1L Vortec™ V8 Engine (VINs V, P, T, Z, N, U, G — RPOs LR4, LM4, LM7, L59, LQ9, LQ4, L18) ... After following the Service Manual diagnostic P0446 and determining that the EVAP canister vent valve is the cause of the SES light, replace the existing EVAP canister vent solenoid and ...

28 Oct 2023 ... Wells CounterPoint Ep. 26 - GM P0446 Vent System Performance-Diagnose & Fix it Right the First Time! GoTech•236K views · 6:39. Go to channel ...

- The TSB for 1999 Toyota Corolla suggests replacing the ECM with an updated part as a repair for the diagnostic trouble code P0446. In some GM cars, a bad fuel tank pressure sensor also could cause the code P0446. - In Mazda Tribute and Mazda 6, the stuck open purge valve (solenoid) could cause the code P0446 or other EVAP codes.Reviews, rates, fees, and rewards details for The My GM Rewards Card™. Compare to other cards and apply online in seconds Excellent Credit, Good Credit $0 Earn 15,000 bonus points ...P0446 is a diagnostic trouble code (DTC) associated with a vehicle’s evaporative emissions control system. It signifies an issue in the vent control circuit in your Chevy Aveo’s EVAP system, which prevents fuel vapor from being released into the atmosphere. A prevalent issue with the Chevy Aveo is the P0446 code.A code P0446 has been stored in memory. Our descriptor for this code (see Figure 1) states that this DTC checks the EVAP system ( Figure 2) for a restricted or blocked vent path. The scan tool being used to check this system is the GM Tech 2. We will take advantage of some of the graphing functions of the scan tool to help draw a …#p0446 #증발가스evap벤트시스템성능 이라는. 고장코드가 감지가 되었네요. 연료시스템 이상으로 확인이 되었습니다. 벤트(evap)시스템은 그말뜻 그대로. 환기시스템이라고 보시면 됩니다. 연료탱크에서 나온 휘발유가스성분에 신선한. 공기주입을 한다는 말뜻입니다.What does this mean? What are the Possible Causes of the DTC P0446 GMC? NOTE: The causes shown may not be a complete list of all potential problems, …P0446 is a diagnostic trouble code (DTC) associated with a vehicle’s evaporative emissions control system. It signifies an issue in the vent control circuit in your Chevy HHR’s EVAP system, which prevents fuel vapor from being released into the atmosphere. A prevalent issue with the Chevy HHR is the P0446 code.The P0446 trouble code is vent solenoid-related EVAP code...but it's rarely actually the vent causing the issue. Check out a quick test you can do to verify ...The P0496 code indicates that there’s an incorrect amount of intake vacuum flow occurring in the car’s EVAP system. Any time this vacuum is higher than what the computer determines is appropriate, the codes will be set. While this code can occur with all brands, it appears to be most common with GM vehicles.A code P0446 could mean one or more of the following has happened: Faulty evap vent valve Open, short or excessive resistance on Vent valve control circuit ... 2013-2023 GM Vapor Canister Purge Valve 12632174 | GM Parts Center Save Big On This OEM GM Vapor Canister Purge Valve, Part #12632174 for 2013-2023 GM. Wholesale Prices, …

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systemcheck2006. 167 posts · Joined 2011. #3 · Oct 15, 2013. P0446 Evaporative Emission Control System Incorrect Purge Flow. "If you went in the same direction as everyone else, then you'd be normal." Like. B.P0446 Symptoms. Check Engine Light is on; A slight decrease in fuel economy; Gasoline smell; Commonly associated with error codes: P0440, P0441, P0442, P0443, P0449; How Do I Fix Code …Mar 19, 2021 · This is a common issue that stumps a lot of people - the dreaded Chevy P0446 code. This code causes folks to think new charcoal canisters, vent valve solenoi... Help support the channel and become a patron.https://www.patreon.com/squarebodystuff Trouble codes P0442 & P0446 and fuel filler issues on our 2005 Chevy Tah...A code P0446 could mean one or more of the following has happened: Faulty evap vent valve Open, short or excessive resistance on Vent valve control circuit ... 2013-2023 GM Vapor Canister Purge Valve 12632174 | GM Parts Center Save Big On This OEM GM Vapor Canister Purge Valve, Part #12632174 for 2013-2023 GM. Wholesale Prices, …General Motors (GM) is an iconic American automobile manufacturer that has left an indelible mark on the automotive industry. With a history spanning over a century, GM has consist...10 Jul 2015 ... In this video I bring you along as I fix this 2006 Chevrolet Impala that has a glowing check engine light with a couple EVAP codes P0446, ...A prevalent issue with the Chevy Cruze is the P0446 code. This code corresponds to a specific number obtained when connecting your Cruze to an OBDII scanner. A faulty vent control valve most commonly causes P0446. Table of Contents Definition Symptoms Causes Diagnosis How to Fix P0446 Definition P0446 is a …in this video I will share with you how to diagnose and Repair the Root cause of a P0446 on a Chevy ImpalaThe most common fix for a P0446 code is to replace the EVAP vent control valve. This part is relatively inexpensive and easy to replace. However, if the problem is related to a damaged or clogged EVAP canister, the repair can be more costly. Sometimes, a faulty pressure sensor may also need to be replaced.Jul 22, 2021 ... Very well could be the sensor. Those evap solenoids can act funny as well. Sometimes they will stick open, sometimes closed, and sometimes just ... ….

Jul 21, 2022 · Dirt and dust intrusion into the EVAP canister vent hose assembly, resulting in restricted air flow, may cause this condition. There is a bulletin for the following models: 1999-2007 GMC Sierra (Classic) Models. 2007-2008 GMC Sierra Models. GMC Factory Service Bulletin OBDII Code P0446. User Submitted Video. Labor: 1.0. To diagnose the P0446 code, it typically requires 1.0 hour of labor. The specific diagnosis time and labor rates at auto repair shops can differ based on factors such as the location, make and model of the vehicle, and even the engine type. It is common for most auto repair shops to charge between $75 and $150 per hour.Jul 21, 2022 · Labor: 1.0. To diagnose the P0446 Chevrolet code, it typically requires 1.0 hour of labor. The specific diagnosis time and labor rates at auto repair shops can differ based on factors such as the location, make and model of the vehicle, and even the engine type. It is common for most auto repair shops to charge between $75 and $150 per hour. Code P0446. Hi I've got a 2000 gmc sierra 1500 5.3. The sending unit on my fuel pump has not been working for some time, so about 3 months ago I replaced it with a Delphi FG0407 which my research indicated should be the best option. I noticed after the install, that the new pump is noisier bc it made a hissing/squirting sound.When it comes to purchasing a new car, one of the first things you might search for is a “GM dealer near me.” And for good reason. There are many advantages to choosing a GM dealer...A prevalent issue with the GMC Terrain is the P0446 code. This code corresponds to a specific number obtained when connecting your Terrain to an OBDII scanner. A faulty vent control valve most commonly causes P0446. Table of Contents Definition Symptoms Causes Diagnosis How to Fix P0446 Definition P0446 is a …Blocked vapor canister. Malfunctioning EVAP or fuel pressure sensor. Poor electrical connection such as shorted wire (Hyundai, Isuzu) A faulty purge or vent …OBD-II Code P0446 is defined as a Evaporative System Vent Control Circuit Malfunction. The evaporative control (EVAP) system captures any raw fuel evaporating from the fuel storage system (e.g. the fuel tank, filler neck, and fuel cap). Under precise operating conditions—dictated by engine temperature, speed, and load—the EVAP system stores ...This truck came to us for a second opinion on the check engine light, P0446. The first shop quoted a vent solenoid replacement, but the customer was skeptica...P0446 Code on my 2007 Chevy Avalanche. Hi there I am having a issue with my truck and I am racking my brain trying to figure some things out with it. If you guys can please help me that would be so great. First problem I have a code that is popping up that is p0446 and my second problem is my remote key start is not working does that have ... P0446 gm, A code P0446 could mean one or more of the following has happened: Faulty vent valve; Open, short or excessive resistance on Vent valve control circuit ; Blockage of vent valve; Bad PCM; Possible Solutions. With a P0446 OBD-II trouble code, here are some things to try: Replace Vent valve; Repair open, short, or resistance problem in control circuit, Code P0446 in a GMC Sierra refers to a problem with the evaporative emission control system. This code indicates that there is a malfunction in the system, …, If the gas cap is faulty, damaged, or deteriorating, replace it and then clear the code. If the P0446 code persists, check for a leak. Some mechanics use a smoke test to check for leaks. A smoke test pushes smoke through the EVAP system to see if the smoke exposes any leaks. After you repair the holes (if you find any), clear the code., This is a common issue that stumps a lot of people - the dreaded Chevy P0446 code. This code causes folks to think new charcoal canisters, vent valve solenoi..., If the ECM attempts to activate the vent control solenoid but detects incorrect voltage feedback or incorrect vacuum or pressure feedback, it will lock out EVAP function, set a diagnostic trouble code (DTC), and illuminate the malfunction indicator lamp (MIL). DTC P0446 is defined as “Evaporative Emission (EVAP) Vent Control Circuit ..., Install the two vent valve pipe clips into the existing underbody holes. Connect the EVAP canister vent valve electrical connector, if equipped. Attach bulk 5/8" heater hose to the vent valve port and secure using a clamp. Run a length as needed along the frame rail routing to the area above the transmission., The P0446 code indicates that there is a problem with the evaporative emission control system. This system is responsible for controlling the release of vapors from the fuel tank. The P0446 code may be caused by a failed EVAP canister, a blocked EVAP vent hose, or a leak in the EVAP system. If you own a Chevy and your check engine light is on ..., Causes. Diagnosis. How to Fix. P0446 Definition. P0446 is a standard OBDII trouble code, applicable to any make or model of vehicle, whether it’s a Malibu or not. …, It’s worth noting that code P0446 is more common on older automobiles, especially those made by domestic manufacturers such as GM. Evaporative Emission System Vent Control Circuit. One of your engine’s strategies to control dangerous emissions is the evaporative emission system vent control circuit. It stops fuel vapors from escaping into ..., Code P0446. Hi I've got a 2000 gmc sierra 1500 5.3. The sending unit on my fuel pump has not been working for some time, so about 3 months ago I replaced it with a Delphi FG0407 which my research indicated should be the best option. I noticed after the install, that the new pump is noisier bc it made a hissing/squirting sound., To fix the automobile fault code p0446, first, check the possible causes mentioned above. Then, visually inspect the wiring harness and connectors related to the issue. Look for any damaged components and check for broken, bent, pushed out, or corroded connector pins. The estimated repair time for this fix is 1.0 hour., When the ECM sends an ON signal, the coil in the solenoid valve is energized. A plunger will then move to seal the canister vent. The ability to seal the vent is necessary for the on board diagnosis of other evaporative emission control system components. This solenoid valve is used only for diagnosis, and usually remains …, Here are a few ways to fix the code P0446. Replace the EVAP system hoses. Repair or Replace the fuel tank. Replace the charcoal canister. Use a proper or new gas cap. Replace faulty vent valves. JamesL Davis. James is a certified auto technician specializing in commercial vehicles., How to fix a Chevy / GMC P0446 engine Code: Evaporative Emission Control System Vent Control Circuit MalfunctionAmazon Link to Smoke Machine: https://amzn.to..., Engine-Codes - Chevrolet - P0446 2017 Chevrolet Silverado. P0446 2017 Chevrolet Silverado Code - Evaporative Emission Vent System Performance. - Code Popularity: 3,441 Views. - Repair Importance Level: 1/3. - Repair Difficulty Level: 3/3., The fault code P0446 means your vehicle’s evaporative emission control system or the vent valve in the EVAP system is malfunctioning. The EVAP system comprises several critical components, including the gas cap, charcoal canister, purge valve, and vent valve. These EVAP system components work together to prevent harmful gas vapor from ..., To fix code P0446, you should first inspect the gas cap. EVAP system issues have many potential causes, making them more difficult to diagnose. Taking a progressive approach from least to most severe is most efficient. If the gas cap is faulty, damaged, or deteriorating, replace it and then clear the code. If the P0446 code persists, check for ..., temp.xml. Bulletin No.: 15-06-04-002. Date: Apr-2015. Subject: Malfunction Indicator Lamp (MIL) Illuminated, Fuel Tank Hard to Fill, DTCs P0442, P0446, P0455 or P0449 Set. Models: 2011-2013 Chevrolet Silverado. 2014 Chevrolet Silverado 1500. 2014 Chevrolet Silverado 2500/3500. , #1 · Dec 21, 2014. Here's a series of steps that worked for me to eliminate the P0446 code on my 2006 Silverado 2500HD 6.0. This code most often refers to a blockage in the …, What can cause the code P0446: - faulty vent control valve. - blockage at the vent hose, vent filter or vent control valve. - open or short in the vent control valve circuit. - bad …, Check engine light code P0446. Suggested repair was to replace the canister purge valve. I did watch a few other videos which first recommended cleaning the ..., My CEL light is on and I get the P0446 code (Evaporative Emission System Vent Control Circuit). This happened two years ago and I replaced the Vapor Canister Vent Solenoid and it fixed the problem. It lasted about a year and now the same code came back and it's E-Test time. This time I replaced the Purge Valve up front on the engine as well., The P0446 trouble code is vent solenoid-related EVAP code...but it's rarely actually the vent causing the issue. Check out a quick test you can do to verify ..., P0446 was the code stored in it.... In this video I have a look at a 2003 Chevrolet Suburban that came in with the SES light on with a code for the EVAP system. P0446 was the code stored in it...., Symptoms. Causes. Diagnosis. How to Fix. P0446 Definition. P0446 is a standard OBDII trouble code, applicable to any make or model of vehicle, whether it’s a Silverado or not. Here’s its technical definition: P0446: Evaporative Emission Control System → Vent Control Circuit → Malfunction., Moreover, the Vehicle Emission Control Information (VECI) label, a critical marker for emission standards compliance, might reflect non-adherence due to the P0446 code. This aberration can potentially lead to failure in emission tests, posing bigger challenges to vehicle owners in states with stringent emission norms., In this video i show you how to test a fuel tank pressure sensor and how to replace a fuel tank pressure sensor. This particular car is a 2007 chevy impala s..., Aug 13, 2018 · P0446 is a diagnostic trouble code (DTC) associated with a vehicle’s evaporative emissions control system. It signifies an issue in the vent control circuit in your GMC Acadia’s EVAP system, which prevents fuel vapor from being released into the atmosphere. A prevalent issue with the GMC Acadia is the P0446 code. , 9236 posts · Joined 2009. #2 · Mar 10, 2011. I have not seen that code come up in the Traverse, Acadia,Enclave forums. But definitely has to do with the fuel system venting or something like that. 2023 Traverse LT 3.6L 15,000. 2013 Equinox 3.6L 121,000. 2003 Trailblazer 4.2L 188,000., dreaded p0446 dtc. on my 2007 silverado gmt900 lt z71, ex cab, vin code j, i've been fighting the dreaded p0446. and with winter coming and having moved to an emissions testing area, this is something that i need to solve soonish. so i FINALLY updated the software on my cen-tech 60794 which allowed me to perform onboard monitor …, A prevalent issue with the GMC Envoy is the P0446 code. This code corresponds to a specific number obtained when connecting your Envoy to an OBDII scanner. A faulty vent control valve most commonly causes P0446. Table of Contents Definition Symptoms Causes Diagnosis How to Fix P0446 Definition P0446 is a …, The National Highway Traffic Safety Administration had yet to post this recall to its online database at the time of publication. Contacts: GM recall number: N202313200. Chevrolet Customer Service ..., When it comes to the P0446, you can try to clean the EVAP vent valve with some standard cleaner for it from your local automotive store. Chances are it is gunked …