>

Po446 code gmc - The 3 causes of a PO446 code, are: - (1)the vent valve of the canister(not the purge valve) is malfunctioning, and ne

P0446 comes on after second start after clearing the code at the b

Mar 7, 2018 · Chevy GM truck P0446 diagnosis. shango066. 78.8K subscribers. Subscribed. 1.1K. 149K views 6 years ago. Correctly diagnosing P0446 code on Chevrolet and GM cars and trucks ...more. Correctly ...P0446 Definition. P0446 is a standard OBDII trouble code, applicable to any make or model of vehicle, whether it's a Cruze 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.What the P0451 code means. As fuel is stored in the vehicle's fuel storage system, some of it will evaporate over time. As this happens, the evaporative emission control system captures that evaporated fuel and then systematically purges it into the engine's combustion process. When the P0451 code is set, it shows that the evaporative ...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.The EVAP system requires the PCM be able to detect a leak as small as 0.040 inch in the EVAP system. The PCM uses several tests to determine if the EVAP system is leaking. P0496 GMC Code - Evaporative Emission System Flow During Non-Purge.P0446 can also trigger when the EVAP tank pressure sensor shows that it failed to maintain the vacuum during the active EVAP leakdown test. If the fuel tank pressure sensor is not showing 0 in Hg ± 0.2 ish with the gas cap removed it's likely borked. You can read the fuel tank pressure PID with Torque Pro.P0446 Code. I've got a 2001 Silverado 1500 with the 4.8 V8. The truck has 84,000 miles on it and has the P0446 code and P0446 pending code. I did some research and replaced the vent solenoid thing between the cab and bed. The light came back on two days later. I decided to replace the gas cap, and the light came on again.When the canister would not vent after the EVAP test, GMs and older Fords would set this code, and in those circumstances, mechanical clogging was considerably more likely to be the cause.. It’s worth noting that code P0446 is more common on older automobiles, especially those made by domestic manufacturers such as GM.. …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 Monte Carlo's EVAP system, which prevents fuel vapor from being released into the atmosphere. A prevalent issue with the Chevy Monte Carlo is the P0446 code.The ECM has closed off all of the fuel tank vapor lines and monitors the vapor pressure and sees a pressure drop more than is allowed within the test parameters of the ECM. The cause of code P0440 can be a loose gas cap which is the most common reason for the code. Code P0440 is also set if any component in the fuel vapor system is leaking like ...Hello all, I have a 2016 GMC Canyon alt displaying a p0451 code for evaporative emission system pressure sensor switch range performance. I made sure the gas cap was tightly closed and reset the code but it came once more. I’m thinking from what I’ve seen online, it might be the pressure sensor on top of the gas tank. Could it be …Aug 13, 2018 · 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 standard OBDII trouble code,If you’re in the market for a new pickup truck, you may be considering the 2020 GMC Sierra 1500. The 2020 Sierra 1500 comes with some noteworthy improvements over the previous year...Code P0446. Jump to Latest Follow ... Chevy Silverado and GMC Sierra Forum. 1.4M posts 181K members Since 2009 A forum community dedicated to Chevrolet Silverado and GMC Sierra pickup owners and enthusiasts. Come join the discussion about performance, modifications, classifieds, troubleshooting, maintenance, and more!The 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.Chevy truck hard to fill gas tank gm evap codes p0442, p0446, p0455 or. 2002 chev silverado 4.8l 4wd p0453 i'm busy working through theOwned 4d rwd Pre-owned 2008 chevrolet silverado 1500 lt 4d crew cab in richmond #Silverado chevy 4x4.According to the GM service bulletin, in some 2011-2013 Chevy, Buick and Cadillac vehicles the code P0442 might be caused by the leaking EVAP Vent Solenoid (CVS). The vent solenoid must be tested under vacuum and replaced if leaking. Another GM service bulletin 02-06-04-037J for Chevy Silverado / GMC Sierra recommends replacing the vent valve ...garye5007 Discussion starter. 7 posts · Joined 2013. #1 · Feb 26, 2018. Hi, I have a 2013 silverado 1500 and it's throwing a p0446 code and I smell gas outside the truck... changed evap solenoid from canister back so I suspect either a plugged canister or a fuel tank pressure sensor.The FIXD wireless OBD2 scanner and free app for iPhone and Android translates your check engine light into plain English so you can rest easy. In this video,...what about the code PO446. I have a 2005 suburban 2500,6.0 engine,what would be the fix for that . Save Share. Like. j cat. ... 2010 GMC SIERRA CREW CAB (Silver) 4x4, ReadyLift 2.5" Level Kit, 305/60/18 Dick Cepek Mud Country, Go Rhino Nerf Bars, Husky Liners front and rear, Bushwacker Bed Rail Caps, EFI/Live Custom tuned. 4:11's ...GMC Yukon P0496 Meaning. P0496 is a universal OBDII trouble code. This means that regardless of which make or model of vehicle, the code will mean the same thing. The code technically stands for: Evaporative Emission System High Purge Flow. The EVAP system captures all fuel vapor from the fuel tank and sends them to the engines intake in order ...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 Trailblazer’s EVAP system, which prevents fuel vapor from being released into the atmosphere. A prevalent issue with the Chevy Trailblazer is the P0446 code.I keep getting a P0446 code on my truck and have been reding on the net and found this true. 04-06-0055) for code P0446 on 2000-03 Cadillac, Chevrolet and GMC full size utility trucks. </P> The charcoal canister stores gasoline vapors from the tank. When certain driving conditions are met, the computer supplies power to the purge and vent solenoids.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 …Reviews, rates, fees, and rewards details for The GM Business Card™. Compare to other cards and apply online in seconds Excellent Credit, Good Credit $0 Get the business card that ...A prevalent issue with the Chevy Corvette is the P0446 code. This code corresponds to a specific number obtained when connecting your Corvette 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 standard OBDII trouble code,Greetings viewers. In this video I dove into a 2014 Chevy Express with the 5.3L engine having a check engine light illuminated and stored codes P0172 and P01...- 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.are jay replacing the evap solenoid/valve on a chevyv5.3l engine to fix check engine light code P0446 evap solenoidWhen 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 opened. P0446 Dodge ...There are a few reasons behind the P0446 Ford F150 code appearing and some simple solutions. Know them and have a risk-free ride. Faulty Vapor Canister Purge Valve. When the vapor canister purge valve is faulty, the check engine light will first be on, and the P0446 code 2010 Ford f150 seems to appear. Then it will adversely affect the …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 ...The trouble codes directory lists P0442 as: Evaporative Emission Control System Leak Detected (small leak). What does this actually mean and where is this problem at? 2006 Chevrolet Colorado, 4X4, Crew Cab, 3.5L, Victory Red, K&N 63 Series Intake, Skidz. Save Share.P0496 code in the GMC Terrain will often be accompanied by an erratic idle. The engine will rev up and down trying to find the proper idle speed. This will often happen right after you buy gas. It also might not start at all at the gas station. If you’re old enough to have driven a carbureted vehicle the old stomp the gas and crank the engine ...Vent evap gmc silverado valve solenoid 1500 location 2001 chevy sierra system p0449 evaporative emission 2008 code cab po446 leakSierra gmc Gmc sierra p0446 code2017 gmc sierra 1500 p0083. ... P0446 code 2014 chevy silveradoFuel pressure sensor installation p0446 evap code gmc canyon video P0446 -what does it mean? (1999-2006 v8 chevrolet ...GM has issued a Technical Service Bulletin that states the more common problem with the P0446 is a faulty Canister Vent Solenoid. GM has updated the solenoid design to correct the problem. The new vent solenoid part number is ***** OE: 23103351. The solenoid is located under the vehicle, mounted to the driver's side frame rail (image below).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 Oldsmobile Aurora’s EVAP system, which prevents fuel vapor from being released into the atmosphere. A prevalent issue with the Oldsmobile Aurora is the P0446 code.The automobile fault code P2635 can be caused by a faulty fuel pump. It can also be caused by an open or shorted fuel pump harness. Poor electrical connection in the fuel pump circuit can also trigger this fault code. Additionally, a faulty fuel pump control module, if applicable, can cause the P2635 fault code to appear.In other instances, the PCM stores more codes aside from the P0506. The codes should be checked and fixed properly to get rid of misdiagnosis. Likewise, the code P0506 is the result of the vacuum leaks or carbon buildup. These components need checking. Ford Explorer Check Engine Light Code P0506.P1116 ECT Signal Unstable Or Intermittent - Read Our Article on Intermittent Diagnosis For Help With This GMC Check Engine Light Code. P1117 Engine Coolant Temp Signal Out-Of-Range Low. P1118 Engine Coolant Temp Signal Out-Of Range High. P1119 ECT Signal Out Of Rage With TFT Sensor. P1120 Throttle Position (TP) Sensor 1 Circuit.In this video I replaced the evap canister purge valve on a 2015 GMC Terrain V6 3.6L that has a PO496 trouble code. It was in a tight spot but got the job do...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 Chevrolet Silverado (Classic) Models. 2007-2008 Chevrolet Silverado Models. Chevrolet Factory Service Bulletin OBDII Code P0446. User Submitted Video.A prevalent issue with the Saturn Ion is the P0446 code. This code corresponds to a specific number obtained when connecting your Ion 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 standard OBDII trouble code,The GMC Sierra is a popular choice among truck enthusiasts for its performance, durability, and stylish design. One aspect that sets the Sierra apart from other trucks on the marke...The P0449 code is, in most cases, caused by a faulty EVAP vent valve or the wirings to it. However, depending on the car model, it could also be caused by other issues related to the EVAP system. The causes of the P0449 trouble code range from simple to more complex. For this reason, it's important to follow the diagnostic steps we provide ...The codes P0442, P0446 and P0455 are all EVAP System codes and shouldn't affect the operation of the truck. If you are in snow country the repairs can wait. The P0300 is for engine misfire and is probably related to the EVAP System issues. If the engine has an occasional misfire it will not need immediate attention, but if it constantly ...One of the most common trouble codes is the P0446 code. This trouble code references a number that is given to you when you plug your vehicle into a OBDII scanner. P0446 Indicates that there is a fault in the evaporative emission control system. It often appears with other codes, such as P0420, P0441, or P0440.How to Resolve GMC Sierra P0446: EVAP Vent Control Circuit Malfunction. The P0446 code in your GMC Sierra indicates a problem with the Evaporative Emission Control (EVAP) system, specifically relating to the vent control circuit.#P0446 #code_P0446 #Obd #diagnosis_code• Automotive Engine Fault Code Reader CAN Scan Tool :- https://amzn.to/3ln9LLT• Scan Tool for Android Devices :- https...HOW TO FIX CODE P0496 CHEVY, GM 1.4L TURBO 2011-2016 CHEVROLET CRUZE CANISTER PURGE VALVE FIXED!Hey guys in this video we show you how easy it is to replace ...I Cover how to diagnose and repair that pesky EVAP code. It is much easier than you think and can easily be fixed at home. The p0455 large leak, the p0449 or...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 Sierra’s EVAP system, which prevents fuel vapor from being released into the atmosphere.Sep 7, 2023 · Code P0446 is a diagnostic trouble code (DTC) that indicates a problem with the evaporative emission control (EVAP) system vent control circuit. Learn more about the causes, symptoms, and fixes for code P0446, including Chevy, Ford, and GMC Sierra specific information, and what the code P0440 means.Jul 21, 2022 · GMC Factory Service Bulletin OBDII Code P0446. User Submitted Video. ⚠ Check if your GMC have Safety Recalls. Description. This Diagnostic Trouble Code (DTC) tests the Evaporative Emission (EVAP) system for a restricted or blocked EVAP vent path that would cause excess amounts of vacuum to be developed in the EVAP system.Faulty EVAP system hose. A Leaking fuel tank. Broken or faulty charcoal canister. What are the symptoms of the P0446 code? The Check Engine Light being present. A fuel …If your GMC Canyon has the P0442 OBD II code, you should first check the fuel cap. If it’s missing or broken, replace it. If the fuel cap seems ok, you must check the EVAP system for a leak. One of the most common issues that happens with the GMC Canyon is the P0442 trouble code. This code appears when connecting the vehicle to an OBDII ...Music has long been shown to boost both cognitive performance and productivity. These are the most popular songs to code to. Music has long been shown to boost both cognitive perfo...If your GMC Canyon has the P0442 OBD II code, you should first check the fuel cap. If it’s missing or broken, replace it. If the fuel cap seems ok, you must check the EVAP system for a leak. One of the most common issues that happens with the GMC Canyon is the P0442 trouble code. This code appears when connecting the vehicle to an OBDII ...Thank-you for holding, Taha. The P0446 is a fairly straight forward code pointing to a problem with the Canister Vent Solenoid. There were two different locations for the vent solenoid on this vehicle. Both are located under the vehicle near, the fuel tank. One version was mounted in front of the tank.Fixed! P0496 Chevy Equinox GMC Terrain 2010-2017 Easy!Equinox Playlist: https://youtube.com/playlist?list=PLe0AKNEOkemhk_NrPm57vcyBd_-tMwC0wIn this video I ...The P0440 code indicates that there is a leak or malfunction in the EVAP emissions system. The EVAP system is a sealed gas vapor system that pulls the fuel vapors from the gas tank and burns them through the engine instead of releasing them into the air. If there is a leak in the lines between the gas tank and the engine, or if the lines are ...I keep getting a P0446 code on my truck and have been reding on the net and found this true. 04-06-0055) for code P0446 on 2000-03 Cadillac, Chevrolet and GMC full size utility trucks. </P> The charcoal canister stores gasoline vapors from the tank. When certain driving conditions are met, the computer supplies power to the purge and …I have an evap code (P0446) on my 2004 Silverado 2500HD (6.0L). I just replaced the Evap control Solenoid (on the manifold) and the Cvap canister vent valve (in the back near the tank). Im not quite sure what else it could be. I also tested all my fuses and assured that adequate power was being supplied to the solenoid.P0446 comes on after second start after clearing the code at the battery Apparently the vent valve is not getting a clean ground to power the coil and close. So what does that mean? ... A forum community dedicated to Chevrolet Silverado and GMC Sierra pickup owners and enthusiasts. Come join the discussion about performance, modifications ...Page 12 October, 2023 Bulletin No.: 22-NA-038. Customer states the engine wont crank or start. Performed related system verification procedure in SI Customer states the vehicle will with no DTCs found and not 12V Battery Low Voltage, start, but the dash lights unable to duplicate concern.Apr 11, 2009 · GM PO446 trouble code "Service engine soon" light came on. My "PocketScan Plus" reads a PO446 code. The description - Buick 2000 Park Avenue questionStep One: Get freeze frame data from your OBD2 scanner. In some cases, more than one code may be present. Step Two: Clear all codes with the scanner. Step Three: Drive for a while and see if the check engine light comes back on. If it does, repeat step one. In some instances, additional codes may not be present the second time.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 testing, and ...I Cover how to diagnose and repair that pesky EVAP code. It is much easier than you think and can easily be fixed at home. The p0455 large leak, the p0449 or...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....Mar 1, 2022 · What Does Code P0446 Mean? P0446 definition: Evaporative Emission Control System Vent Control Circuit Malfunction. Issue Severity: LOW– Continued driving for a short period of time is okay. Repair Urgency: Get this code fixed withing the next month to prevent issues related to the emissions system including failed inspections.The revolution we've all been waiting for hasn't yet arrived. Despite the good intentions behind the movement to get people to code, both the basic premise and approach are flawed....The P0445 code tells us that it is an electrical problem in the EVAP purge control valve circuit, and not a leak in the EVAP system. How to diagnose the P0445 Code. Diagnosing a P0445 code can be done if you have basic knowledge of car electronics and have a multimeter at home. Here’s how a professional mechanic would diagnose the …Easy Chevy Silverado GMC Sierra Evap Emission Code P0446 Fix For Free Click Here To Donate to the channelhttps://www.paypal.com/cgi-bin/webscr?cmd=_s-xclick&...Jan 14, 2024 · 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, specifically with the vent control circuit. The evaporative emission control system helps reduce harmful fuel vapors from escaping into the atmosphere. When this code appears, it means that ...Code p0446. I changed the vent solenoid and the engine light is still on. - Chevrolet 2003 Avalanche question ... HAVE A TROUBLESHOOTING MESSAGE PO446. Evaporative Emission (EVAP) how to find a leak without replacing canister on chevy silverado 1500 ... I have 2006 GMC Sierra SLE 4WD 5.3 liter and my engine light comes on giving me the code ...I am getting the P0446 code. I tried to blow out the vapor solenoid valve with air and after that I couldn't even fill my tank because it wouldnt vent at all. I replaced the solenoid valve and drove about 200 miles and the code came back. Cleared it and now I'm right around 200 miles again, and it hasn't come back, but the EVAP monitoring cycle ...Code P0446 on a GMC Sierra refers to an issue with the vehicle’s evaporative emission control system. This code indicates a problem with the vent control …A prevalent issue with the Chevy Silverado is the P0446 code. This code corresponds to a specific number obtained when connecting your Silverado 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 standard OBDII trouble code,ran into this about 2 weeks ago - bought part number 25932569 - (evap canister) for 50 bucks from the dealership. (apparently the part for our trucks is alot more - around the 150 dollar mark, all we need to do with our trucks is reuse the hose to make the cheap part work.)The last place you want to look to repair a P0446 code is the purge solenoid, the first place you want to look to repair a P0446 code is the evap vent solenoid. ... A forum community dedicated to Chevy Colorado and GMC Canyon owners and enthusiasts. Come join the discussion about performance, modifications, troubleshooting, towing capacity ...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 Ford Focus’s EVAP system, which prevents fuel vapor from being released into the atmosphere. A prevalent issue with the Ford Focus is the P0446 code.Got a po446 code. Put on new gas cap, changed evap, even got cadillac converter checked, code wont clear. 2006 cadillac dts. ... Dream car: tie between a '71 Hemi 'Cuda and a '91 GMC Syclone. #GirlDad #SaveTheManuals. Find a Certified Shop. We've partnered with RepairPal to recommend trustworthy shops in your area. Enter your details to ...A prevalent issue with the GMC Sierra is the P0446 code. This code corresponds to a specific number obtained when connecting your Sierra 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 standard OBDII trouble code,The P0446 fault code is related to the Evaporative Emission (EVAP) system in your automobile. It specifically tests for any restrictions or blockages in the EVAP vent path, which can cause excessive vacuum pressure to build up in the system. When this fault code is triggered, the Engine Control Module (ECM) commands the EVAP purge solenoid ...How to fix a Chevy / GMC P0446 engine Code: Evaporative Emission Control System Vent Control Circuit MalfunctionAmazon Link to Smoke Machine: https://amzn.to...Hi there, I have a 2003 gmc sierra 1500 with a 5.3 liter. it has 114,000 miles.Service engine light is on, and I retrieved a code Po446 Evaporative emission vent system performance. Any help resolving … read moreThis shouldn't be difficult to diagnose and repair shouldn't be expensive. P0446 isn't a leak it's a blockage or partial blockage in the evap system vent path. Extremely dirt contaminated EVAP Vapor can or insects (mud daubers or spiders) nesting in the vent valve inlet hose are common problems that will set this code.A registered DTC P0101 on Chevrolet, P0101 code on Nissan, or any vehicle shows underlying several system issues. The causes of these issues include. Defective mass airflow sensor. Dirty MAF sensor. Vacuum leaks. Cracked intake boots. Frayed, burnt, or wiring harness issues on the MAF sensor.P0446 code on 2010 gmc sierra 1500 will not go away. Vent valve and harness jumper, fuel tank pressure sensor, purge valve, charcoal canister, all lines, and gas cap are all new. Some parts I’ve changed 2-3x now with no luck. Wire from ecm to the vent valve I have also verified is okay. Mechanic's Assistant: The code P0446 may indicate a ...I have a 2004 Avalanche, 49K mileage, code PO446, charcoal in line, recomended replace fuel/, How to fix the P0046 code TURBO BOOST CONTROL SOLENOID DURAMAX LLY, C. cart7881. 5784 posts · Joined 2012. #2 · Oct 12, 2021., P0446 code on 2010 gmc sierra 1500 will not go away. Vent valve and harness jumper, fuel tank , To diagnose the P0446 2016 GMC Sierra code, it typically requires, =====Claim your FREE engine code eraser 👉 https://free.nonda.co 👈=====Engine Code P0451 Saving R, Tenants can be sentenced to up to three years in jail. Cameroon is , Hi i have a 2003 chevy silverado 5.3 it has a p044, P0446 Definition. P0446 is a standard OBDII trouble code, ap, Engine light on, code PO446 EVAP emission control system , Now you can get student loans to attend coding camps—but is that a goo, How to remove a GMC Canyon vent control solenoid and cha, I try to diagnose a P0446 evap code. And I get some new sunglass, This is a short video on easy way to confirm DTC P0446 and som, This truck came to us for a second opinion on the check engine , This is a common issue that stumps a lot of people - the dreaded Chev, 674. May 30, 2017. #7. P0446 indicates a blockage or restriction, , If the gas cap is faulty, damaged, or deterioratin.