Chevrolet p0442

May 23, 2021 · What Does the P0442 Code Mean? The PO442 indicates that there’s a small leak in the EVAP system. When the vehicle engine is turned off, the Electronic Control Unit (ECM) carries out a leak test to double-check that the evaporative emission control system is functioning correctly. In this test, the ECM seals the EVAP system.

Chevrolet p0442. I have a 2015 Impala LT V6. I have about 45K miles on the car. About a month ago the check engine light came on and a scan revealed code P0442, small evap system leak. I tightened the gas cap, reset the light, and soon it came back. I replaced the gas cap, reset the light, and soon it came back. I'm about to replace the purge valve and solenoid.

Oct 20, 2018 · I have a 2015 Impala LT V6. I have about 45K miles on the car. About a month ago the check engine light came on and a scan revealed code P0442, small evap system leak. I tightened the gas cap, reset the light, and soon it came back. I replaced the gas cap, reset the light, and soon it came back. I'm about to replace the purge valve and solenoid.

Just a heads up for those who like to diy mechanics on your own vehicle. I searched for video's for a 2005 Chevy Trailblazer purge solenoid replacement and d...Mar 15, 2023 ... PURGE VALVE: https://www.rockauto.com/en/moreinfo.php?pk=10958080&cc=1446667&pt=4936&jsn=1 Disclaimer: Due to factors beyond the control of ...Jun 26, 2021 · Ensure your Chevy Suburban's fuel tank is between 1/4 and 3/4 full. Engine coolant temperature must be below 122°F and within 11°F of the ambient air temperature. Do not leave the key on prior to the cold start or the heated oxygen sensor (O2) diagnostic may not run. If your Chevy S10 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 Chevy S10 is the P0442 trouble code. This code appears when connecting the vehicle to an OBDII …If you’re in the market for a Chevrolet Corvette, you probably want to ensure that you get the best deal possible. Negotiating the price of a car can be intimidating, but with some...The P0442 code means that the control module has detected a small leak in the Evaporative Emission (EVAP). A loose fuel tank filler cap is the most common cause …

P0010, 11, 13, 14 - You need to replace the VVT actuator solenoids for intake and exhaust. Buy the ACDelco brand because the cheap aftermarket ones are unreliable junk. P0442 - Evap leak. You might just need a new gas cap. It is safe to drive with those codes, but you should address the issue soon.P0442 & P0455 Possible Solution. EVAP codes are a pain and dreaded once they appear. Started on me just over two years ago and its been a battle since. Purge Valve replaced, Vapor canister replaced, vent valve and solenoid replaced, filler neck, gas cap, etc etc etc. Mileage has been steadily decreasing on me since July and ive been down …Any component in your EVAP system with a small leak could be causing this engine code, including all the clamps and O-rings, torn hoses, leaking gaskets, leaking valves, or even a defective sensor. So, while the symptoms are often limited, the cause can be notoriously tricky to track down. Defective, damaged, loose, or missing fuel cap.P0442 is a common diagnostic trouble code that indicates a small leak in the Evaporative Emission Control (EVAP) system of your GMC vehicle. To diagnose and fix this issue, you can start by checking the gas cap for any damage or looseness. If it appears to be in good condition, you may need to inspect the EVAP system hoses, valves, and …Yes P0442 is a leak in the fuel vapor system. If tightening the gas cap fixed it then it will take a few days to turn off the light. 2019 Premium Iridescent Pearl Tricoat Previous Volts. 2018 Chevy Traverse 14 LT1 17 Premium. 1964 Corvair Monza Convertible.P0442 is a common diagnostic trouble code that indicates a small leak in the Evaporative Emission Control (EVAP) system of your GMC vehicle. To diagnose and fix this issue, you can start by checking the gas cap for any damage or looseness. If it appears to be in good condition, you may need to inspect the EVAP system hoses, valves, and …The on-board diagnostics, or OBD, code P0442 can often be fixed by tightening the gas cap or replacing the gas cap. The code indicates a small leak in the evaporative emissions, or...Jan 12, 2020 · P0442 & P0455 Possible Solution. EVAP codes are a pain and dreaded once they appear. Started on me just over two years ago and its been a battle since. Purge Valve replaced, Vapor canister replaced, vent valve and solenoid replaced, filler neck, gas cap, etc etc etc. Mileage has been steadily decreasing on me since July and ive been down around ...

Common causes of the P0442 code include a malfunctioning fuel cap, a leak or damage in the EVAP system line, charcoal canister, or fuel tank, a malfunctioning vent valve or purge valve, a faulty FTP …About Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy & Safety How YouTube works Test new features NFL Sunday Ticket Press Copyright ...Sep 29, 2015 · New member. I just started to get the P0442 Code (Evap Emission System Leak Detected) on my 2012 Chevy Equinox. It happens after I get gas and after 3-4 engine starts after. I have tried a new gas cap and it still does it. I don't smell gas in our outside of the car, no rough idle, just puzzled why this would happen at 38k. Common problem for the code P0442 (small leak in the evap emission system) on the GMC/Chevy 1500 V6 engine. A hole in the top of the purge solenoid. The prop...2018 Emissions Leak check engine light P0442. I have a 2018 Chevy Volt with very low miles. The check engine light came on and I took it to get checked and it gave a code of P04221 EVAP small leak detected. The guy at AutoZone said it could be a loose gas cap. I tightened and it didn't go away.Therefore, this article will discuss generic trouble code P0442 as it applies to the Chevrolet models that are most commonly affected by it. END OF SPECIAL NOTES. OBD II fault code P0442 is a generic code that is defined as, “Evaporative Emission System Leak Detected (Small Leak)”, and is set when the PCM (Powertrain Control Module) …

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Jun 7, 2021 ... Share your videos with friends, family, and the world.A tiny crack or hole in a fuel vapor hose or tube. A different type of leak somewhere else in the EVAP system. A faulty vent or purge valve. A bad vent seal. An unreliable leak …Conclusion. If your Chevy Cruze 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 Chevy Cruze is the P0442 trouble code. This code appears when connecting the vehicle …How to fix a Chevy or GMC P0442 Code: Evaporative Emission System Small Leak DetectedAmazon Link to Smoke Machine: https://amzn.to/41U0DifHow to Test a Purge...If the purge valve leaks, it could trigger a P0455 or P0442 code, but it might also trigger a different EVAP code. If the purge solenoid is defective, replace it. Steps include removing the hoses and disconnecting the electrical connector. 3. Faulty Vent Solenoid Valve – P0442 or P0455. Vapor canister and fuel tank.The code P0442 is set when the PCM detects a small EVAP leak. There are three basic types of EVAP leak detection methods in use today: Natural leak detection. This type of system primarily uses a fuel tank pressure sensor with vent and purge solenoids. It was designed to find small leaks consistent accuracy.

Dec 18, 2012 ... ... chevrolet, chevy, code, engine, envoy, gmc, p0442, po442 · Subscribe. Related Topics. P0442 and P0452 dtc codes · P0442 code · Replaced fu...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 ...The Chevy Silverado P0442 code indicates a small evaporation system leak, most likely caused by a loose gas cap or a faulty seal. The best way to fix this problem is …There are two ways to reset P0442. You can plug a scan tool into your Equinox and command it to clear the codes, or you can repair the EVAP leak. If you clear the code without fixing the cause, it will return. If you fix the leak without clearing the code, the check engine light may take a few drive cycles to turn off.About $30 for the AC Delco part, and maybe 30 min. to change it. Very easy. 2016 White Colorado LT 2WD Ext. Cab. 3.6L V6 6 Spd. Automatic with Dipstick, Pedal Commander, BakFlip G2 Tonneau, Elite CC, Tow Mirrors, Cargo Floor, DeeZee Bed Mat, (-) Airdam, Tow Hooks, Towing Starcraft AR One 18QB TT, 1955 Chevrolet Bel Air 283 … =============================Claim your FREE engine code eraser 👉 https://free.nonda.co 👈==== How to Fix P0442 ===========Engine Code P0442 Saving Repair P... 197,000 miles on this '01- 2wd -4.3 vortec. Was traveling down the N.J. Turnpike ( ) and saw my CEL illuminate. Did not affect driveability so I made it down to our Delaware Beach house, 200 + miles away. Drove it all week with the CEL on but with no issues. Got back home a week later (CEL still on) and read the code...p0442-emissions …P0442 doesn’t specify where the leak is coming from, only that there is a leak. Unfortunately, when this code appears by itself, it doesn’t specify which part of the EVAP system the leak is coming from. A professional shop can use a smoke machine to test precisely where your Express’s EVAP system is leaking from. Purge Valve.5 posts · Joined 2020. #12 · Oct 22, 2020. FWIW my brand new supposedly correct and well reviewed aftermarket gas cap for my '11 Impala just does not feel right when clicking in, not positive. Gasket looks good. I got the code P0442 and had an old cap with a worn gasket so I replaced with this.The problem is your gas cap. Pretty much the number one cause of the P0442 CEL. Get to your dealership and get a replacement gas cap and your check engine light and the P0442 will go away once and for all. If the gas cap doesn't seal it will set a trouble code. 1997 TR Coupe.This code appears when connecting the vehicle to an OBDII scanner and pertains to the emissions system. While it’s unlikely to cause a breakdown, it can be …

So got a 2004 Chevy trailblazer 4.2 v6 and we have the infamous p0442 which is small Evap leak detected and we know it’s not a gas cap issue because we had s...

el video demuestra como podemos tener codigo p0442 evap small leak y como poder saber con solo desconectar la linea de vacioYesterday I was driving down the road everything was fine, then the engine light popped up.Service engine soon!! What do I do next? Watch as I go through so...Replacing speakers in a vehicle is one of the simplest and most cost-effective ways of improving the sound in your car. The Chevrolet Colorado is a good candidate for speaker repla...Messages. 37. Location. Lexington, SC. Sep 24, 2009. #1. OK guys. I know that this has been discussed up one side and down the other, but I have tried all that I have read about and I still am getting the "P0442 (M) Evap Leak Monitor Medium (0.040) Leak Detected A small leak has been detected in the evaporative system" code in my '02.May 23, 2016 · The code P0442 is set when the PCM detects a small EVAP leak. There are three basic types of EVAP leak detection methods in use today: Natural leak detection. This type of system primarily uses a fuel tank pressure sensor with vent and purge solenoids. It was designed to find small leaks consistent accuracy. How to fix a P0442 code. You can fix the P0442 code with the following methods: Putting on a new gas cap or putting in a new gas tank. Changing out the charcoal container. Putting in new lines for the EVAP system. Change the air or purge valves. With an ODB-II reader, you can clear the code. Conclusion. If your Chevy Orlando 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 Chevy Orlando is the P0442 trouble code. This code appears when connecting the …There are two very common, very easy fixes to solve a P0442 Engine Code: Changing the Canister Vent Solenoid and changing the Purge Valve Solenoid. In this...P0442 doesn’t specify where the leak is coming from, only that there is a leak. Unfortunately, when this code appears by itself, it doesn’t specify which part of the EVAP system the leak is coming from. A professional shop can use a smoke machine to test precisely where your Monte Carlo’s EVAP system is leaking from. Purge Valve.If your Chevy Venture 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 Chevy Venture is the P0442 trouble code. This code appears when connecting the vehicle to an OBDII ...

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This video will help you repair a rough idle code P0442 on your Silverado 07-11. Leave a comment if you have any issues or questions.This is a fairly simple ...Yesterday I was driving down the road everything was fine, then the engine light popped up.Service engine soon!! What do I do next? Watch as I go through so...The code P0442 is set when the PCM detects a small EVAP leak. There are three basic types of EVAP leak detection methods in use today: Natural leak detection. This type of system primarily uses a fuel tank pressure sensor with vent and purge solenoids. It was designed to find small leaks consistent accuracy.If your Chevy Uplander 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 Chevy Uplander is the P0442 trouble code. This code appears when connecting the vehicle to …It showed P0442: evaporative emission system leak detected (small leak). I've been told having a smoke test done is the easiest way to find the leak but the local shop said it'll cost $42.50 for an hour of time (I'm cheap and would rather find it myself). After some research I decided to pop the hood and check the purge solenoid.So twice now I've had both P0455 and P0442 codes appear, and I once got the 'tighten gas cap' message on the DIC. ... Motors software pre-installed. iLink400 GM scanner is a full-System Bi-Directional Diagnostic Scanner for 1996 to 2019 Chevy, GMC, Cadillac, Buick, Pontiac, Saturn, Chevrolet Truck, Chevrolet MPV, Pontiac APV, …Conclusion. If your Chevy Cruze 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 Chevy Cruze is the P0442 trouble code. This code appears when connecting the vehicle …P0442 code chevy silverado diagnosis and troubleshootingP0442 silverado code chevy chevrolet canister 2005 evap valve 1500 trouble common most chairs source Silverado 2008 z71 brown 1500 4x4 cab extended metallic desert chevrolet color cashmere accents ebony light gtcarlot transmission colors2008 chevrolet silverado 1500 17900.- Expected to Generate $150 Million in Annual Revenues- Share Repurchase Update ProvidedHOUSTON, March 28, 2023 /PRNewswire/ --Group 1 Automotiv... - Expected to Generate $150 Mi...The P0442 code is an important diagnostic trouble code (DTC) to be aware of when maintaining your vehicle. This code indicates that there is a small leak in your vehicle's evaporative emission control (EVAP) system, which plays a crucial role in reducing harmful emissions. In this article, we will discuss the meaning of the P0442 code, its common …in this video I'm gonna share with you how to diagnose the cause of a P0442 & P2270 Trouble code on a Chevrolet Express!! #Evap #02sensorJul 29, 2018 · A leak in the fuel vapor hose leading from the fuel tank to the intake will throw P0442 in your Impala. Fuel Tank Pressure Sensor (If Equipped) If the fuel tank pressure sensor has gone bad, it can cause many problems, including the P0442 code. Not all vehicle’s have a fuel tank pressure sensor. You’ll need to verify if your Impala has one ... ….

Jul 28, 2018 · P0442 doesn’t specify where the leak is coming from, only that there is a leak. Unfortunately, when this code appears by itself, it doesn’t specify which part of the EVAP system the leak is coming from. A professional shop can use a smoke machine to test precisely where your Express’s EVAP system is leaking from. Purge Valve. A leak in the fuel vapor hose leading from the fuel tank to the intake will throw P0442 in your Aveo. Fuel Tank Pressure Sensor (If Equipped) If the fuel tank pressure sensor has gone bad, it can cause many problems, including the P0442 code. Not all vehicle’s have a fuel tank pressure sensor. You’ll need to verify if your Aveo has one or not.L. Ltaylor0916. 3 posts · Joined 2014. #8 · Nov 7, 2014. Sorry to bring up an old topic, however my truck is giving the PO442 code. I have replaced the purge valve, vent valve, and replaced the gas cap with one from the dealership. The code goes off for a few days and then eventually comes back on.The on-board diagnostics, or OBD, code P0442 can often be fixed by tightening the gas cap or replacing the gas cap. The code indicates a small leak in the evaporative emissions, or...If the purge valve leaks, it could trigger a P0455 or P0442 code, but it might also trigger a different EVAP code. If the purge solenoid is defective, replace it. Steps include removing the hoses and disconnecting the electrical connector. 3. Faulty Vent Solenoid Valve – P0442 or P0455. Vapor canister and fuel tank.P0442 Code Chevy Silverado. When there’s a small leak in your EVAP system, the code P0442 can get triggered. The evaporative emission control system prevents all sorts of vapors, especially from the fuel escaping into the atmosphere. Here’s a table with all the reasons and fixes to the code P0442 on a Chevy Silverado.May 2, 2023 by Jason. One of the most common issues that happens with the Chevy Cruze is the P0442 trouble code. This code appears when connecting the vehicle …Mar 16, 2017 ... After you cleared your error code, did it pop back up whenever your gas level was down around 1/4 full? Currently driving:<br />2012 Chevrolet ...Chevy Silverado P0442 Definition. P0442 is a OBDII trouble code. The code technically stands for: Evaporative Emission System Leak Detected. The EVAP system … Chevrolet p0442, Code P0442 2017 Chevrolet Silverado Tech Notes. The P0442 code means that the control module has detected a small leak in the Evaporative Emission (EVAP). A loose fuel tank filler cap is the most common cause that will trigger the P0442 code. There is a factory service bulletin for all the models from 2000 through 2021., The P0442 code indicates that there is a small leak in the evaporative emission control system (EVAP). The purpose of an EVAP system is to keep the gas vapors from ending up in the atmosphere. The engine control unit (ECU) is conducting an EVAP test to see if is it working properly. During the test, the ECM is checking the system for …, Aug 2, 2018 · If your Chevy Corvette 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 Chevy Corvette is the P0442 trouble code. This code appears when connecting the vehicle to an ... , What Does The P0442 Error Code Mean? The P0442 code indicates a fault with the EVAP system, specifically a small leak. This system is designed to stop fuel …, EVAP code p0442. Advice. I just got an diagnostic for a check engine light on my chevy cobalt 2010 and basically, it says it's a small EVAP leak detected, replaced the gas cap today and waiting for the light to go off, wonder what it could be, if you're able to help, it would be much appreciated 💀 sorry for this pretty vague post. 1., The fuel level is between 10-90%. The start-up engine coolant temperature (ECT) and the start-up intake air temperature (IAT) are within 8º C (46ºF). The drive distance before engine shut-off was more than 5 km (3 mi). The ambient air temperature at the end of the drive cycle is between 0-34ºC (32-93ºF)., How to fix a P0442 code. You can fix the P0442 code with the following methods: Putting on a new gas cap or putting in a new gas tank. Changing out the charcoal container. Putting in new lines for the EVAP system. Change the air or purge valves. With an ODB-II reader, you can clear the code. , The P0442 trouble code indicates a small leak in the evaporative emission control system. This system is designed to prevent harmful fuel vapors from escaping into the atmosphere. When the code appears, it means that the evaporative emissions system is detecting a leak that’s larger than 0.040 inches in the system., If the purge valve leaks, it could trigger a P0455 or P0442 code, but it might also trigger a different EVAP code. If the purge solenoid is defective, replace it. Steps include removing the hoses and disconnecting the electrical connector. 3. Faulty Vent Solenoid Valve – P0442 or P0455. Vapor canister and fuel tank., Dec 26, 2021 ... Replaced the vent valve as a bit of a shot in the dark. Too early to tell if it's fixed. Not counting on it, but at least the car's driver ..., A code P0442 most likely means one or more of the following has happened: A loose or improperly affixed gas cap. A non-conforming gas cap (i.e. not factory/original brand) A …, If your Chevy Captiva 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 Chevy Captiva is the P0442 trouble code. This code appears when connecting the vehicle to an …, Originally Posted by Corvette#2. Today, out of the blue, the check engine light came on. I pulled all of the codes. The only active one was 10 PCM P0442 C H. I checked the list and it means "Evaporative Emission (EVAP) System Small Leak Detected". I cleared the code. Went for a drive and it didn't come back., A leak in the fuel vapor hose leading from the fuel tank to the intake will throw P0442 in your Malibu. Fuel Tank Pressure Sensor (If Equipped) If the fuel tank pressure sensor has gone bad, it can cause many problems, including the P0442 code. Not all vehicle’s have a fuel tank pressure sensor. You’ll need to verify if your Malibu has one ..., How to fix P0172 P0175 Fuel Trim System Rich Bank 1 and 2P0442 P0455 Evaporative Emission System Small and Large Leak Detected. #snapon#chevy#cooltools https..., If your Chevy Captiva 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 Chevy Captiva is the P0442 trouble code. This code appears when connecting the vehicle to an …, There are two ways to reset P0442. You can plug a scan tool into your Equinox and command it to clear the codes, or you can repair the EVAP leak. If you clear the code without fixing the cause, it will return. If you fix the leak without clearing the code, the check engine light may take a few drive cycles to turn off., Jul 29, 2018 · A leak in the fuel vapor hose leading from the fuel tank to the intake will throw P0442 in your Impala. Fuel Tank Pressure Sensor (If Equipped) If the fuel tank pressure sensor has gone bad, it can cause many problems, including the P0442 code. Not all vehicle’s have a fuel tank pressure sensor. You’ll need to verify if your Impala has one ... , Overview of the causes and fixes for a P0496 Code Evaporative Emission System High Purge Flow on a Chevy Traverse.Read Here for more information: https://www..., Apr 27, 2019 · P0442 fixed. '09 2.4 got the famous P0442 small emission leak code and CEL light. Last year it was step one, gas cap and problem solved. This year after a couple resets nope it ain't the gas cap bad or loose as I'm in NJ and no self serve gas so pump mutants leave caps loose. I've been double checking them. , If your Chevy Avalanche 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 Chevy Avalanche is the P0442 trouble code. This code appears when connecting the vehicle to …, The P0442 code indicates a fault with the EVAP system, specifically a small leak. This system is designed to stop fuel vapor pollution (HydroCarbons) from entering the atmosphere. It also improves ..., Jul 8, 2018 · Tahoe P0442 Code Defined. P0442 is an OBDII trouble code. The code technically stands for: Evaporative Emission System Leak Detected. The EVAP system captures all fuel vapor from the fuel tank and sends them to the engine’s intake in order to be ignited in the normal combustion process. When the Chevy Tahoe’s computer detects that the EVAP ... , Mar 10, 2015 · Common problem for the code P0442 (small leak in the evap emission system) on the GMC/Chevy 1500 V6 engine. A hole in the top of the purge solenoid. The prop... , el video demuestra como podemos tener codigo p0442 evap small leak y como poder saber con solo desconectar la linea de vacio, The worldwide owner-to-owner online support system for the Chevrolet Caprice PPV. Skip to content. Quick links. FAQ · Donate · Site home Forum ..., 8 months ago I made a video on a p0442 code I was getting on my trailblazer, and a few weeks ago I made one for a p0455 code as well. Well the p0442 code had..., Jan 27, 2022 ... Find out how to find an EVAP leak in your car if you get a P0455 or P0442 code indicating a small or large EVAP leak., What Does The P0442 Error Code Mean? The P0442 code indicates a fault with the EVAP system, specifically a small leak. This system is designed to stop fuel …, There are two ways to reset P0442. You can plug a scan tool into your Equinox and command it to clear the codes, or you can repair the EVAP leak. If you clear the code without fixing the cause, it will return. If you fix the leak without clearing the code, the check engine light may take a few drive cycles to turn off., Sep 29, 2015 · New member. I just started to get the P0442 Code (Evap Emission System Leak Detected) on my 2012 Chevy Equinox. It happens after I get gas and after 3-4 engine starts after. I have tried a new gas cap and it still does it. I don't smell gas in our outside of the car, no rough idle, just puzzled why this would happen at 38k. , Generally, a P0442 trouble code is caused by a loose gas cap (one that wasn't tightened enough after fueling the vehicle). If a loose gas cap is not the problem, then the following problems could be causing the P0442 trouble code: Damaged/incorrect gas cap. Damaged/leaking EVAP system hose., A P0442 code indicates that the system is detecting a small leak in the system, which can be caused by several factors. Some common causes of a P0442 code Chevy Silverado include: 1. Loose Or Damaged Gas Cap. A loose or damaged gas cap is a common cause of the P0442 code in the Chevy Silverado.