P0455 code chevy colorado

GM has issued a service bulletin PI0639C to address a service stability message and trouble codes C0710 and C0455 for the vehicles listed below. ... 2007-2012 Chevrolet Colorado. 2007-2013 Chevrolet Avalanche, Silverado 1500. 2007-2014 Chevrolet Silverado HD, Suburban, Tahoe. 2008-2016 Chevrolet Express.

Chevrolet Silverado Models 2014 2017 4.3L (LV3), 5.3L (L83), 6.2 (L86) Suburban Models 2015 2016 5.3L (L83) GMC Sierra Models 2014 2017 4.3L (LV3). 5.3L (L83), 6.2L (L86) Yukon Models 2015 2016 5.3L (L83), 6.2L (L86) Involved Region or Country North America and N. A. Export Condition Some customers may comment that the Malfunction Indicator ...The P0445 code indicates that the engine control module recognized a short circuit to the purge control valve. The Purge Control Valve is also called the EVAP valve, and it regulates the fuel vapors between the engine and the fuel tank. The purge control valve is often just a solenoid with two wires, 12v+ and ground.7 thg 12, 2022 ... P0455 looks like an EVAP code. For DTC P0455 (large leak detected), the vehicle will set the code due to large leak or purge blockage.Well i went and got the codes scanned and this is what i get p0455, p0300, p0420, p0430. ... 2015 Chevrolet Colorado LT Ext. Cab 3.6 / V-6 / 6 Speed Auto. / 4x2 ...What Does Code P0449 Mean? P0449 definition: Evaporative System (EVAP) Vent Circuit Control 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. Diagnosis: It is important to …This code belongs to a range of related evaporative emission trouble codes which include P0450, P0452, P0453, P0454, P0455, P0456, P0457, P0458, and P0459. What are the possible …Labor: 1.0. The cost to diagnose the P0496 Chevrolet code is 1.0 hour of labor. The diagnosis time and labor rates at auto repair shops vary depending on the location, make and model of the vehicle, and even the engine type. Most auto repair shops charge between $75 and $150 per hour.

Aug 19, 2018 · A very common issue with the Chevy Colorado is the P0449 code. This trouble code is a reference number that is given to you when you plug your Colorado into a OBDII scanner. P0449 deals with the evaporative emissions control system. It often appears with, or is related other codes, such as P0420, P0446, and very often P0440. Once the fault code P0455 diagnosis is complete, your mechanic will need to repair or replace the faulty EVAP system component. Depending on the vehicle type and severity of the issue, the repair cost of fault code P0455 ranges from $25–$600. Here’s an estimated cost breakdown: Diagnosis: $100. New gas cap: $25.Code P0455 Chevrolet Tech Notes. The P0455 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 P0455 code. There is a factory service bulletin for all the models from 2000 through 2021. The factory states that there …2005 Chevy Colorado Z71 Crew Cab 4x4 5 cylinder w/ auto trans. 89,000 miles. Pops OBD codes P0455 and P0506. I replaces the gas cap with a brand new one and disconnected the battery to reset the compu … read moreAug 12, 2015 · 14 posts · Joined 2015. #8 · Aug 18, 2015. Colly_shifter said: Gentlemen, if you have replaced the PCM, crankshaft sensor, cam position sensor or even the engine itself on the truck, you're going to have to have a CASE relearn done to resolve the P0017 code or any other associated codes, like P0315. If you're having issues with the P0017 code ... To learn more about the EVAP system and purge valve and how they can trigger codes like p0496, read our technical explanation here. P0496 in Various Makes. Although it can affect any vehicle regardless of make, code P0496 often happens to owners of GM vehicles (Chevrolet, Pontiac, and Dodge, among others).30 thg 12, 2019 ... P0455 code? Jump to Latest Follow. 1082 Views 6 Replies 3 Participants Last ... Chevrolet Colorado and GMC Canyon. Join to discuss rebuilds ...

Nov 20, 2008 · Below is a full list of GM OBD-II Diagnostic Trouble Codes. If you dont have acess to a OBD-II scanner to check your "check engine light" most of your local auto parts will scan your system for FREE. P0016 - Crankshaft Position Camshaft Position Correlation Bank 1 Sensor A. P0030 - Heated Oxygen Sensor (H02S) Heater Control Circuit Bank 1 Sensor 1. The codes P0442, P0446 and P0455 are all EVAP System codes and shouldn't affect the operation of the truck. ... A forum community dedicated to Chevy Colorado and GMC Canyon owners and enthusiasts. Come join the discussion about performance, modifications, troubleshooting, towing capacity, ...Code P0365 on Some Chevrolet Vehicles Chevy defines the P0365 as a problem with the “ Exhaust Camshaft Position Sensor Circuit .” On engines with separate intake and exhaust camshafts also equipped with variable valve timing, these cam sensors provide the ECM/PCM feedback for VVT operation and to determine injector and ignition …According to Chevy Silverado’s database, the Diagnostic trouble code (DTC) P0455 simply means “Evaporative Emission Control System (EVAP) Large Leak Detected”. In other words, your car’s computer will only signal this code when a leak is considered significant in the EVAP system. The code also shows up in car brands like Ford, Jeep ...Labor: 1.0. The cost to diagnose the P0451 Chevrolet code is 1.0 hour of labor. The diagnosis time and labor rates at auto repair shops vary depending on the location, make and model of the vehicle, and even the engine type. Most auto repair shops charge between $75 and $150 per hour. Search for P0451 Chevrolet Questions and Answers: Search ...

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Chevy Colorado P0455 and P0449 codes and replacing vent valve selenoid Patrick Murphy 2.52K subscribers Subscribe 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 1 2 3 4 5Here are the most common causes of the P0014 code in your Chevy Colorado. Start by checking your truck’s oil level. Here are the most common causes, presented in order from the easiest thing to check to the most difficult: Engine Oil. The first thing you should do is check your Colorado’s oil. There are three ways that it can cause …Chevrolet Tahoe 4x4: I have a 07 Tahoe. Getting the p0455. I have a 07 Tahoe. Getting the p0455 code. Reset the light and notice if comes on when the tank gets half empty. I replaced the vent solenoid, … read more.A prevalent issue with the Chevy Colorado is the P0446 code. This code corresponds to a specific number obtained when connecting your Colorado to an OBDII scanner. A faulty vent control valve most commonly causes P0446. Table of Contents Definition Symptoms Causes Diagnosis How to Fix P0446...SOURCE: 2006 5.3ltr chevy silverado z71 p0455 andp0449 These codes are for the evaporative emission system.The 455 is the vent solenoid.The 455 is a large leak in the evap.system.The vent solenoid I would replace because they go bad and will not work because they are under the vehicle in the rear of the truck.There is a bulletin for these …

Once the fault code P0455 diagnosis is complete, your mechanic will need to repair or replace the faulty EVAP system component. Depending on the vehicle type and severity of the issue, the repair cost of fault code P0455 ranges from $25–$600. Here’s an estimated cost breakdown: Diagnosis: $100. New gas cap: $25.What does this mean? Code P0455 Chevrolet Tech Notes The P0455 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 P0455 code. There is a factory service bulletin for all the models from 2000 through 2021.Sep 15, 2023 · P0597 on Some Chevrolet Vehicles. Code P0597 may appear on some Chevrolet vehicles like the 2012 Chevrolet Cruze LS 1.8L, L4. Conditions for running DTC P0597 in a 2012 Chevy Cruze LS can include: The ignition is ON, or the engine is running. The ignition voltage is greater than 9 V. DTC P0597 00 runs continuously once the above conditions are met. 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.jccq153 Discussion starter. 49 posts · Joined 2020. #1 · Nov 5, 2020 (Edited) I post this in case someone is experiencing something similar. The truck used to throw P0014 code intermittently and clear itself after a couple of cycles, so the dealer never did anything as the code wasn’t present at that moment. When the cel was present the ...My stepdaughter chevy cruze is throwing this code. Any clue as to what it could be on this model 2014 Ltd 1.4 ... P0455 Code; P0401 Code; P0172 Code; P0446 Code ...Diagnostic trouble code (DTC) P018B stands for “Fuel Pressure Sensor ‘B’ Circuit Range/Performance.” If the engine control module detects that the voltage signal stays the same while the fuel pump is working, it will trigger the P018B code. The P018B code can be caused by a faulty fuel pressure sensor, circuit issues, or a PCM problem.P0455: EVAP LARGE LEAK DETECTED FIXED FAST & EASY 2007-2017 CHEVY IMPALA - THIS IS HOW WE FIXED IT!Hey guys in this video we got a 2014 Chevy Impala that cam...The P0455 trouble code is a generic powertrain code, but not all manufacturers use it. This DTC indicates that there’s a significant leak in the EVAP system. It’s been reported with many brands, such as Chevrolet, Nissan, Jeep, Ford, and Dodge.Dec 16, 2010 · 99 Answers. These are emission system codes p0455 is large leak detected the pcm monitor gas tank pressures to determine if it has a vapor leak and it is detecting a vapor leak larger than .040 of an inch these generally are best diagnosed by a dealer. Posted on Dec 16, 2010. 2005 Colorado extended cab 3.5l Check engine light and code p0455 is on. No smell of gas. No smell of gas. At any gas station when i fill the tank all the way the nozzle clicks off and then immediately about a pint of gas spits back out.

OBD-II code P0455 is a problem with an Evaporative Emission Control System Leak. Get expert information on fault code P0455. Close. OBD-II Trouble Code Chart / P0455 - OBD-II Trouble Code; Get back on the road. Find auto repair near me; Troubleshoot a car problem; Ask a question; Free repair ...

October 19, 2023 by Jason. P0455 in the Chevy Silverado is a trouble code that indicates your truck has a LARGE evaporative emissions leak. This code indicates that there is a large leak in the evaporative emission control system and can cause issues such as decreased fuel efficiency, rough idling, and increased emissions.Here are the most common causes of the P0014 code in your Chevy Colorado. Start by checking your truck’s oil level. Here are the most common causes, presented in order from the easiest thing to check to the most difficult: Engine Oil. The first thing you should do is check your Colorado’s oil. There are three ways that it can cause …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.I was able to fix the P0455 (Large Evap Leak) code by replacing the gas cap. This should be your first step. Evaporative Emission System Leak Detected ( Lar...P0440= unable to pull vac. P0441= no flow P0442, P0456, P0457= small leak P0455 = large leak P0443 P0446 P0449 = purge solenoid issue. P0450 P0451 P0452 P0453= fuel tank pressure sensor issue P0496= evap flow when seal is supposed to be set. The only way to really find the small leak is luck or smoke. See more.One of the most common trouble codes with the Chevy Colorado is the P0496 code. This code number references a number that is given to you when you plug your Colorado into an OBDII scanner. Related: P0420 Chevy Colorado. Chevy Colorado P0496 Symptoms. P0496 code in the Chevy Colorado will often be accompanied by an erratic idle.The EVAP system prevents harmful gases from escaping into the atmosphere and does not affect how the engine runs, which means this code is not a breakdown risk. System Gross Leak. When there is a large leak in the Chevy Tahoe’s EVAP system, it will throw the P0455 OBDII Code. P0455 indicates a large leak in the …P0455 indicates a large leak in the evaporative emission control system. (EVAP). There are different leak size codes. For example, P0456 means your Corvette has a small EVAP leak. While the trouble code may state that there is a “large leak” in the EVAP system of your Chevy Corvette, the actual leak will most likely still look relatively small.

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P0455 in the Chevy Cavalier is a trouble code that indicates your truck has a LARGE evaporative emissions leak. With this code, you shouldn't notice any symptoms besides perhaps a noticeable fuel smell. P0455 usually is not an immediate threat to the driveability of your Cavalier. But, whenever the check engine light is on, it's.Nov 5, 2020 · jccq153 Discussion starter. 49 posts · Joined 2020. #1 · Nov 5, 2020 (Edited) I post this in case someone is experiencing something similar. The truck used to throw P0014 code intermittently and clear itself after a couple of cycles, so the dealer never did anything as the code wasn’t present at that moment. When the cel was present the ... I have replaced the purge valve solenoid, the canister vent valve solenoid, and the gas cap. I am now getting a p0455( Large Evap Leak Detected) code after all ...Jul 26, 2023 · Where is the vent valve on a 2004 Chevrolet express 1500. 0. Reply. CarParts.com Research Team. Author. ... P0455 Code; P0401 Code; P0172 Code; P0446 Code; P0011 Code ... Labor: 1.0. The cost to diagnose the P0451 Chevrolet code is 1.0 hour of labor. The diagnosis time and labor rates at auto repair shops vary depending on the location, make and model of the vehicle, and even the engine type. Most auto repair shops charge between $75 and $150 per hour. Search for P0451 Chevrolet Questions and Answers: Search ...P0506 is a generic DTC, which means various makes and models support it. Although it is a generic code, the diagnostic and repair steps for each case may vary depending on the specific vehicle that you own. For example, repair steps for a P0506 code for a Chevy may be different from the repairs steps for a P0506 code in a Ford.Our service team is available 7 days a week, Monday - Friday from 6 AM to 5 PM PST, Saturday - Sunday 7 AM - 4 PM PST. 1 (855) 347-2779 · [email protected]. Read FAQ. GET A QUOTE. Trouble code P0332 means the PCM is receiving a reading that the knock sensor is too low, which can result in higher emissions and engine problems.May 11, 2023 · 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. ….

To learn more about the EVAP system and purge valve and how they can trigger codes like p0496, read our technical explanation here. P0496 in Various Makes. Although it can affect any vehicle regardless of make, code P0496 often happens to owners of GM vehicles (Chevrolet, Pontiac, and Dodge, among others).Learn more about the P0499 code, its symptoms, ... P0499 is commonly stored in makes like Dodge, Honda, and Chevrolet, among others. While this DTC is considered a generic powertrain code, ... See also P0455 Code: Evaporative Emission Control System Large Leak Detected.System Lean. The code is thrown when the oxygen sensors detect the air-fuel mixture is “lean” (too much air or not enough fuel). The vehicle’s PCM will add more fuel to the mixture to bring the air-fuel mixture where it needs to be for optimal combustion. It also throws the code P0171 to let you know it has done this.=====Claim your FREE engine code eraser 👉 https://free.nonda.co 👈=====Engine Code CHEVROLET P0454 Saving Re... 99 Answers. These are emission system codes p0455 is large leak detected the pcm monitor gas tank pressures to determine if it has a vapor leak and it is detecting a vapor leak larger than .040 of an inch these generally are best diagnosed by a dealer. Posted on Dec 16, 2010.P0455: EVAP LARGE LEAK DETECTED FIXED FAST & EASY 2007-2017 CHEVY IMPALA - THIS IS HOW WE FIXED IT!Hey guys in this video we got a 2014 Chevy Impala that cam...Aug 19, 2018 · A very common issue with the Chevy Colorado is the P0449 code. This trouble code is a reference number that is given to you when you plug your Colorado into a OBDII scanner. P0449 deals with the evaporative emissions control system. It often appears with, or is related other codes, such as P0420, P0446, and very often P0440. 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 Colorado’s EVAP system, which prevents fuel vapor from being released into the atmosphere. A prevalent issue with the Chevy Colorado is the P0446 code.P0455 in the Chevy Colorado is a trouble code that indicates your truck has a LARGE evaporative emissions leak. With this code, you shouldn’t notice any symptoms besides perhaps a noticeable fuel smell. P0455 usually is not an immediate threat to the driveability of your Colorado. P0455 code chevy colorado, The average vapor canister purge valve replacement cost is between $50 and $300, depending on the car model and labor costs. While those little plastic components might not look like much, they’re not cheap to replace. The part alone usually costs between $30 and $150. From there, you have to factor in labor rates too., Nov 20, 2008 · Below is a full list of GM OBD-II Diagnostic Trouble Codes. If you dont have acess to a OBD-II scanner to check your "check engine light" most of your local auto parts will scan your system for FREE. P0016 - Crankshaft Position Camshaft Position Correlation Bank 1 Sensor A. P0030 - Heated Oxygen Sensor (H02S) Heater Control Circuit Bank 1 Sensor 1. , Dec 16, 2020 · GM has issued a recall for certain examples of the 2017-2020 Chevy Colorado and GMC Canyon due to a potential problem with the evaporative emissions canister. ... The tell tale sign is code P0455 ... , 43 posts · Joined 2015. #1 · Sep 2, 2017. The other day the check engine light lit up, pulled the codes and I got p0442 (small evap leak) and p0496 (high purge flow ) on my 2015 chevy Colorado LT 4wd 3.6 64k miles. Kind of bumped since it's relative new. Did a smoke test and couldn't find any leaks., P-Codes (Powertrain) Código P0455. P0455 – Fuga detectada en el sistema de control de emisiones evaporativas (fuga bruta). P0455 – Evaporative Emission Control ..., My camaro keeps ringing code P0455 2016+ Camaro: 6th Gen Camaro general forum, It’s a generic code (same meaning for all vehicles) that indicates that your truck’s third cylinder is misfiring. P0303 is a real drivability concern and should be dealt with right away. If it’s bad enough to cause your Colorado’s check engine light to flash, avoid driving your truck altogether until you find the misfire and repair your ..., The P0455 diagnostic trouble code appears when there’s a leak in the Evaporative Emission Control (EVAP) system, and the system can’t maintain pressure. The EVAP …, Check Engine light P0455. Jump to Latest Follow. 49K views 27 replies 12 participants last post by dhectorg Oct 7, 2017. O. OffroadJunkie84 Discussion starter. 621 posts · Joined 2008. #1 · Oct 25, 2008. Alright, I have looked at the search for this and it does say it can be caused by the fuel cap. However I also checked this issue and ..., P0445 is typically caused by a short circuit (as the code suggests) or by a bad purge valve (stuck open/closed). Before you do anything, make sure the gas cap is on and sealed tightly. A bad gas cap can throw this code. It’ll usually be accompanied by other codes as well, such P0455. Your vehicle’s Evaporative Emissions Control System is ..., Video on diagnosing and repairing a P0455, which is an EVAP large leak detected code on a 2007-2014 Chevy Tahoe.https: ..., Code P0455 Chevrolet Tech Notes. The P0455 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 P0455 code. There is a factory service bulletin for all the models from 2000 through 2021. The factory states that there are seven ..., Jul 7, 2012 · Skill Level Easy, 1 beer Project Vehicle Make: Chevrolet Model: Colorado Year: 2006 Engine: 2.8L Power windows: Yes Sun Roof: No Tools Needed 12mm socket, ratchet Flat screwdriver OBDII code scanner or Scangauge (optional) Project Time 30 minutes Project Cost Approximately $30 Many of the members here have recieved the code P0455. It's nothing ... , According to Chevy Silverado’s database, the Diagnostic trouble code (DTC) P0455 simply means “Evaporative Emission Control System (EVAP) Large Leak …, The P0455 diagnostic trouble code appears when there’s a leak in the Evaporative Emission Control (EVAP) system, and the system can’t maintain pressure. The EVAP system usually consists of ..., A 355nation How To presented by Josh Project Name How to replace your evap solenoid/canister to cure code P0455. Project Description In this How-To, I will guide you through replacing the evap solenoid/canister under your truck in hopes of curing a P0455 code, for about 1/4 the price of using the "proper" GM part. Skill Level Easy, 1 …, Check Engine light P0455. Jump to Latest Follow. 49K views 27 replies 12 participants last post by dhectorg Oct 7, 2017. O. OffroadJunkie84 Discussion starter. 621 posts · Joined 2008. #1 · Oct 25, 2008. Alright, I have looked at the search for this and it does say it can be caused by the fuel cap. However I also checked this issue and ..., Code P0455 Chevrolet Tech Notes. The P0455 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 P0455 code. There is a factory service bulletin for all the models from 2000 through 2021. The factory states that there are seven ..., Oct 22, 2008 · 711 posts · Joined 2007. #1 · Oct 22, 2008. I got this code read from my Scangauge. 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. , Can't get rid of P0455 code. Jump to Latest Follow ... Enjoy banner ad-free browsing with Chevrolet Colorado & GMC Canyon Forum Plus. Learn more. Chevrolet Colorado & GMC Canyon Forum. A forum community dedicated to Chevy Colorado and GMC Canyon owners and enthusiasts. Come join the discussion about performance, …, Jul 27, 2018 · System Lean. The code is thrown when the oxygen sensors detect the air-fuel mixture is “lean” (too much air or not enough fuel). The vehicle’s PCM will add more fuel to the mixture to bring the air-fuel mixture where it needs to be for optimal combustion. It also throws the code P0171 to let you know it has done this. , jccq153 Discussion starter. 49 posts · Joined 2020. #1 · Nov 5, 2020 (Edited) I post this in case someone is experiencing something similar. The truck used to throw P0014 code intermittently and clear itself after a couple of cycles, so the dealer never did anything as the code wasn’t present at that moment. When the cel was present the ..., For instance, a solution that worked for a logged P0894 on a Chevy might not work on a Toyota with the same set code. See also Bad Torque Converter: Symptoms, ... P0455 Code; P0401 Code; P0172 Code; P0446 Code; P0011 Code; P0340 Code; Automotive Features toggle close features. Driving; Lifestyle; EVs and Hybrids; Trivia …, Apr 19, 2021 · Customer has been having trouble with the check engine light coming on and wants it off. So I am doing a smoke test to see what is going on. P0442 Evaporat... , This trouble code references a number that is given to you when you plug your 9-3 into a OBDII scanner. P0455 Indicates that there is a large leak in the evaporative emission control system. It often appears with, or is related other codes, such as P0420, P0441, and very often P0440. P0455 is normally not an immediate threat to the drive ..., P0455 is a diagnostic trouble code (DTC) for "System Gross Leak Evaporative Emission". 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 for $154.99 . , P0455 in the Chevy Colorado is a trouble code that indicates your truck has a LARGE evaporative emissions leak. With this code, you shouldn't notice any symptoms besides perhaps a noticeable fuel smell. P0455 usually is not an immediate threat to the driveability of your Colorado., I have replaced the purge valve solenoid, the canister vent valve solenoid, and the gas cap. I am now getting a p0455( Large Evap Leak Detected) code after all ..., 55,476 satisfied customers. My check engine light came on woth code p0455. I know it is. My check engine light came on woth code p0455. I know it is evap problems. But also when taking gas cap off to fuel truck it was pushing so much air … read more., What does this mean? Code P0455 Chevrolet Tech Notes The P0455 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 P0455 code. There is a factory service bulletin for all the models from 2000 through 2021., I have replaced the purge valve solenoid, the canister vent valve solenoid, and the gas cap. I am now getting a p0455( Large Evap Leak Detected) code after all ..., The codes P0442, P0446 and P0455 are all EVAP System codes and shouldn't affect the operation of the truck. ... A forum community dedicated to Chevy Colorado and GMC Canyon owners and enthusiasts. Come join the discussion about performance, modifications, troubleshooting, towing capacity, ..., Nov 6, 2013 · C. Crisco86 Discussion starter · Nov 6, 2013. Have had the P0449 and P0455 code for a while now and finally going to fix this tomorrow. But now its throwing a P0300 at me. I did notice in the last two weeks that the idle was getting rough and has progressively gotten worse. Now it runs rough most of the time at all driving speeds.