Chevrolet dtc p0449-00

P0449 Chevy Malibu. A very common issue with the Chevy Malibu is the P0449 code. This trouble code is a reference number that is given to you when you plug your Malibu 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.

Chevrolet dtc p0449-00. * The DTC run once an ignition cycle when the above conditions are met. Conditions for Setting the DTC The ECM detects that the commanded state of the driver and the actual state of the control circuit do not match for greater than 5 seconds. Action Taken When the DTC Sets DTC P0449 00 is a Type B DTC. Conditions for Clearing the DTC

Jul 31, 2018 · Here is what I found. The ground is switched in the PCM. See attached. Also below is an excerpt from the DTC P0499 for my 1999. Circuit Description A voltage is supplied directly to the EVAP Vent valve solenoid. The PCM controls the solenoid by grounding the control circuit via an internal switch called a driver.

GM is adding an electric Chevrolet Silverado pickup truck to its lineup, as the automaker pushes to deliver more than 1 million electric vehicles globally by 2025. GM President Mar...753. 44K views 1 year ago. in this video I'm gonna share with you how to diagnose and Fix the cause of a P0449 Trouble code On a GMC/CHEVY truck with a …I have been trying to replace the Evap vent solenoid to clear code P0449 with no luck. I removed the rear passenger side wheel to try and access the part without dropping the axle, but it's near-impossible. The access hole is so small and narrow, and I can't see anything when my hand is in there trying to find the tabs on the side to remove it.Let us check out the issue on this new to me 2008 Chevrolet trailblazer. I bought it from a customer who had just purchased it but decided not to go further ...Car: 2019 Chevrolet Malibu 1.5L LT. Mileage: Approximately 80,000 miles. Problem: Check Engine Light (CEL) illuminated with DTCs P0449 and P0455. DTC (s): P0449 EVAP vent solenoid valve control circuit, P0455 EVAP system large leak detected. Solution: Replace vent valve wire harness, PN 84944780 (supersedes 84427106)This trouble code is a reference number that is given to you when you plug your Corvette 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. P0449: Evaporative Emission Control System Vent Valve/Solenoid Circuit …

Code B101D Chevrolet Description. Internal fault detection is handled inside the device. The symptom byte information is for engineering reference only. No external circuit diagnosis is involved. The Diagnostic Trouble Code (DTC) will be set when the device has detected an internal malfunction. This DTC will affect only the device to which the ...There are two actually PCV valves... P1101: MAF Out of Self Test Range. P1101 is one of the most common of the Chevy Cruze trouble codes. Whenever you start the vehicle, the mass airflow sensor does a self diagnostic. If the results of this test are out of range, than the P1101 trouble code is thrown.Customer Complaint: This 2019 Chevrolet Traverse with a 3.6 liter engine came into the shop with a complaint of a check engine light and stalling problem. The customer states that the vehicle will randomly shut off. The codes in this vehicle were: P0171 - Fuel Trim System Lean Bank 1. P0174 - Fuel Trim System Lean Bank 2.Gorecki. 245 posts · Joined 2011. #2 · Oct 26, 2011. P0449 Evaporative Emission Control System Vent Valve/Solenoid Circuit Malfunction. This is commonly caused by something as simple as not having your gas cap on completely. If this is the case and your gas cap is seating properly, the code should go away by itself or worse case send a …Check engine light code P0449 Chevrolet Forum Chevy Enthusiasts Forums Web this video will show you how to fix p0449 emissions dtc on gm vechicles, like tahoe, suburban, yukon, avalanche, silverado, escalade, express.disclaimer:warn. ... code said 02 sensor replaced both on right side, now runs rough and light is still on you shoul. The gm dtc ...A scan tool will display the commanded state of the EVAP Vent Solenoid Valve as Not Venting (On) or Venting (Off). The Diagnostic Trouble Code (DTC) will be set when the ECM detects the EVAP vent solenoid valve control circuit is shorted to the ground within 0.25 s. P0498 Chevrolet Code - Evaporative Emission System Vent Valve Control …

The automobile fault code P069E indicates a problem with the fuel pump or its control module. The most common symptom is the engine light being illuminated or the service engine soon warning light appearing. This fault code can be caused by a faulty fuel pump, a faulty fuel pump control module, an open or shorted fuel pump control module ...The automobile fault code P0641 indicates a problem with the Engine Control Module (ECM). Symptoms may include engine performance issues or even a complete failure to start. The cause of this fault code can be a faulty ECM, an open or shorted ECM harness, poor electrical connections in the ECM circuit, or a shorted sensor on the 5-volt circuit.The P0440 code is a common trouble code that many Chevy Silverado owners may encounter. It indicates that there is an issue with the truck’s Evaporative Emission Control (EVAP) system. Specifically, the EVAP system is malfunctioning. A variety of causes can trigger the P0440 code, with the most common one being a loose or …The instrument cluster will illuminate or display the engine oil pressure indicator when the engine oil pressure is low. The Diagnostic Trouble Code (DTC) will be set when the ECM detects that the engine oil pressure sensor signal circuit is greater than 4.8 V for greater than 10 s. P0523 Chevrolet Code - Engine Oil Pressure Sensor Circuit High ...6. Secure the 12 inch (30.5 cm) length heater core hose to the fitting on the pre filter (1), using a hose clamp. 7. Secure the in-line filter (2) to the other end of 12” (30.5 cm) length hose, using a hose clamp. 8. Secure the longer heater core hose to the fitting at bottom of in-line filter (3), using a hose clamp. 9.

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P0449 00: Evaporative emission (EVAP) system, vent valve - circuit ... PIE0528 - ENGINE AND ENGINE COOLING CHEVROLET: ... Pitstop: sorento (xm) with dtc codes P0449 or P2422 - some sorento (xm) vehicles may set a dtc flow P0449 or P2422 which may be caused by spider webs in and around the evaporative emissions vent lines creating the …* The DTC run once an ignition cycle when the above conditions are met. Conditions for Setting the DTC The ECM detects that the commanded state of the driver and the actual state of the control circuit do not match for greater than 5 seconds. Action Taken When the DTC Sets DTC P0449 00 is a Type B DTC. Conditions for Clearing the DTCThe most common cause of code P0449 is failure of the vent valve caused by the presence of dirt or charcoal particles, or a failure of the vent valve control solenoid that prevents the valve from opening or closing. Other possible causes include-. Burnt, damaged, shorted, or corroded wiring and /or connectors. Open circuits.This code references a number that is given to you when you plug it into a OBD2 scanner. P0449 deals with the evaporative emissions control (EVAP) system. It often appears with, or is related other codes, such as P0420, P0446, and very often P0455. P0449 is normally not an immediate threat to the drive-ability of your Blazer.

How to Fix the P0449 Code. Like other OBD-II codes, the repair process for the P0449 code varies based on what caused the issue and, in some cases, the vehicle’s make and model. For instance, replacing the EVAP canister vent solenoid/valve is one of the most common confirmed fixes for P0449 in a Chevy Avalanche. I have been trying to replace the Evap vent solenoid to clear code P0449 with no luck. I removed the rear passenger side wheel to try and access the part without dropping the axle, but it's near-impossible. The access hole is so small and narrow, and I can't see anything when my hand is in there trying to find the tabs on the side to remove it.Soluciones del código obdii P0449. Verifique sus fusibles, puede haber un fusible que impulse el solenoide de ventilación. Revise si hay un arnés de cableado frotado o rozado. Inspeccione ambos cables para ver si están en cortocircuito entre sí, a tierra o a la potencia. Inspeccione visualmente la válvula de ventilación en busca de ...P0449 Chevy Suburban. A very common issue with the Chevy Suburban is the P0449 code. This trouble code is a reference number that is given to you when you plug your Suburban 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 …Top Five Key Takeaways About P0449 OBD-II Trouble Code. P0449 indicates a vent valve malfunction in the evaporative emission control system, causing issues managing fuel vapors. Common symptoms include the check engine light, fuel fumes, refueling difficulties, and fuel gauge inaccuracies.How to Fix a P0449 Engine Code on a Chevy. When you get a P0449 error code on your Chevy, the problem is most frequently caused by the vent valve failing stuck open. When this happens, you need to replace the whole canister which has the vent valve attached to it.Causas del código DTC P0449. Pueden haber diversas razones por las que se detecta un código DTC P0449 en un vehículo. Algunas causas pueden ser: Falla en la válvula de ventilación: La válvula de ventilación puede estar obstruida o dañada, lo que impide que funcione correctamente y provoca la activación del código P0449. Esta válvula de ventilación, aunque es simple, forma parte del complejo sistema EVAP (Sistema de control de emisiones evaporativas). El código P0449 es común en: Buick Rendezvous, Cadillac Escalade, Chevrolet Avalanche, Chevrolet Equinox, Chevrolet Malibu, Chevrolet Silverado, Chevrolet Suburban, Chevrolet Tahoe, Chevrolet Uplander ...

Jun 9, 2011 ... Comments78 · 2005 Chevy Tahoe Fuel Filling Slowly PART 1 From Clogged Charcoal Canister Vent Lines · 2019 - 2023 GMC Sierra P0498,P0449,P0499 EVAP&nbs...

If your scan tool can access fault codes and the only one you retrieve from other modules is the U0131, try to access the PSCM module. If you can access codes from the PSCM module, then the U0131 code is either intermittent or a memory code. If unable to access codes for the PSCM module, then the U0131 code that the other modules are setting is ...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. P0449: Evaporative Emission Control System Vent Valve/Solenoid Circuit …2008 gmc envoy/trailblazer with the code for p0449 evap vent solenoid. pointed out the location of the solenoid and explained how to test the bad unit.Subscribed. 753. 44K views 1 year ago. in this video I'm gonna share with you how to diagnose and Fix the cause of a P0449 Trouble code On a GMC/CHEVY truck with a 6.0L Engine, Enjoy! ...more.Bill Saporito test-drives the new Chevy SS, a flashback to the time of stick-shift muscle cars. By clicking "TRY IT", I agree to receive newsletters and promotions from Money and i...Code P0449 is a diagnostic trouble code (DTC) that indicates a problem with the evaporative emission control ... Special Price $34.00 Regular Price $40.00. DENSO 234-4127 | Oxygen Sensor. ... Chevrolet Traverse Reliability And Common Problems.The Chevrolet car uses a design that makes the dashboard a single piece that extends from the driver's side to the passenger's side of the car. For the purposes of repairing or rep...

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3 posts · Joined 2018. #1 · Dec 18, 2018. Hello fellow, My 2005 malibu recently thrown out some codes to me: p0442- evap system small leak, p0449- vent valve/solenoid circuit, P0463- fuel level sensor A circuit high, P0455- evap system large leak. I did the replacement for a new fuel cap and a new evap purge solenoid, and found …My Check Engine Light came on in my 2005 Chevy Avalanche Z71. Used a code reader to find P0449 code. Did some research and found out the purge valve for the ...has all the Mode-6 (trouble codes) data about the Volt. Its clear they have a lot of trouble codes, so if you get an MIL, and get the numbers from onstar or an OBDII device you can at least look them up. Maybe I'll convert the DTC into codes for the torque andriod app. Also some interesting tidbits about battery and other elements at the very end.This trouble code is a reference number that is given to you when you plug your Spark 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. P0449: Evaporative Emission Control System Vent Valve/Solenoid Circuit …Chevrolet Silverado 1500 (New Model - 12th VIN Digit = 7) - 4WD 2019 2019 All All Silverado 1500 (New Model) Silverado 1500 2020 2023 ... vent solenoid and set DTC’s P0442, P0446, P0455 or P0449. Cause The condition may be caused the by the normal use of these vehicles operating in severe dusty environments. Page 2 June, 2023 Bulletin …The P0449 is a fairly straight forward code pointing to a fault in the EVAP Vent Solenoid, and once into the diagnostic flow chart, you are directed to the above mentioned TSB. So, somewhere, somehow, there is a …A very common issue with the Chevy Tahoe is the P0449 code. This trouble code is a reference number that is given to you when you plug your Tahoe 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. P0449: Evaporative ...If no voltage, check fuse 62 underhood for being blown. If the fuse is good but no power, check the wire from the fuse block to the solenoid for an open circuit. 3. Check the solenoid resistance to be 10-30 ohms. 4. Check the White wire for an open or short to ground back to the Fuel Pump Driver Control Module (FPDM).Even slight variations in the air/fuel mixture will cause the converter temperature to rise significantly. The “Catalytic Converter Efficiency” Diagnostic Trouble Codes (DTCs) P0420 and P0430, are among the top 10 DTCs technicians face. And while the description might imply a failed converter, odds are the ultimate fault lies somewhere …P0017 is a generic powertrain code that applies to all OBD-II-equipped vehicles. This DTC indicates that the camshaft position sensor and the crankshaft position sensor aren’t timed together as they should be. The manufacturer sets the particular degrees it must be off for the code to set. The crankshaft position sensor (CKP) and …Causes and Fixes GMC or Chevy P0449 engine code: Evaporative Emission Vent Solenoid Valve Control Circuit Malfunction.Amazon Link to Smoke Machine: https://a...GM stock is in the spotlight today as General Motors gets ready to unveil its Chevrolet Silverado E truck. Where is the automaker going next? Wedbush says the Silverado E is 'not y... ….

P0449 Chevy Trailblazer. A very common issue with the Chevy Trailblazer is the P0449 code. This trouble code is a reference number that is given to you when you plug your Trailblazer 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 ...The ECM only monitors the EVAP control system pressure sensor when the fuel tank level is between 25 and 75 percent. The code P0452 is set when the ECM reads a low voltage signal from the EVAP control system pressure sensor. Note: Circuit Low Input codes are often the result of low battery voltages (that can have many possible causes), bad ...Buick. Code: P0449. Definition: EVAP Vent Solenoid Control Circuit Malfunction. Description: Engine started; system voltage over 10.0v and the PCM detected the Actual and Commanded state of the Vent Solenoid driver control circuit did not match for 30 seconds. Cause: Vent solenoid control circuit is open or shorted to ground.Aug 21, 2019 ... P0449 With Good Vent Valve ... GMC / Chevy Truck -DTC P0449 EVAP Vent Solenoid Control Circuit ... 11:00 · Go to channel · AdBlue Diagnostics Made&nb...A perfect video showing why a simple incandescent test light can be your best friend when troubleshooting an output solenoid circuit that has an open in the ...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.Aug 19, 2018 · This trouble code is a reference number that is given to you when you plug your Traverse 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. P0449: Evaporative Emission Control System Vent Valve/Solenoid Circuit Malfunction. Condiciones para Eliminar la MIL/DTC Código de falla P0449. • El módulo de control APAGA la luz indicadora de mal funcionamiento (MIL) después de 3 ciclos de ignición consecutivos en que el diagnóstico se ejecuta y no falla. • El DTC actual, Última Prueba Fracasada, se borra cuando el diagnóstico se ejecuta y pasa. How to Fix the P0449 Code. Like other OBD-II codes, the repair process for the P0449 code varies based on what caused the issue and, in some cases, the vehicle’s make and model. For instance, replacing the EVAP canister vent solenoid/valve is one of the most common confirmed fixes for P0449 in a Chevy Avalanche. Chevrolet dtc p0449-00, The 1960s Classic Chevrolet Cars Channel covers popular antique Chevrolets from the decade. Take a look under the hood of 1960s classic Chevrolet cars. Advertisement The 1960s Clas..., The instrument cluster will illuminate or display the engine oil pressure indicator when the engine oil pressure is low. The Diagnostic Trouble Code (DTC) will be set when the ECM detects that the engine oil pressure sensor signal circuit is greater than 4.8 V for greater than 10 s. P0523 Chevrolet Code - Engine Oil Pressure Sensor Circuit High ..., Chevrolet Trax (2013-2022) Workshop Manual. Engine. Engine Controls and Fuel - 1.4L. Engine controls and fuel - 1.4l - Diagnostic information and procedures. ... DTC P0449, P0498, OR P0499 Diagnostic Instructions Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure., Jan 18, 2019 ... Código P0449: Qué Significa y SOLUCIÓN【Actualizado 2024】 . Mecanica Automotriz PRO · 2.9K views ; GMC / CHEVY Truck - DTC P0449 EVAP Vent ..., The diagnostic can determine if a small leak is present based on vacuum or pressure readings in the EVAP system. When the system is sealed, a finite amount of pressure or vacuum will be observed. When a 0.51 mm (0.020 in) leak is present, often little or no pressure or vacuum is observed. If the test reports a failing value, DTC P0442 will set., I'll show how to replace the defective Vapor Canister Vent Solenoid, which is causing the engine light on my dash to come on. The part number used for my Sil..., Chevrolet Silverado 1500 (New Model) 2019 2019 Equipped with 5.3L L82, 5.3L L84, 6.2L L87, 4.3L LV3, 2.7L ... When checking for DTC's, any combination of the following codes may be found: ... P0443 P0449 P0451 P0452 P0453 …, This code means that the car’s computer detected trouble with the EVAP system vent valve’s function. This vent valve is also known as the purge valve. The computer is responsible for monitoring and controlling the purge valve. If the P0446 DTC sets, it could indicate that there’s an electrical failure in the circuit or a mechanical ..., DTC P0499. Evaporative Emission (EVAP) Vent Solenoid Valve Control Circuit High Voltage. Conditions for Setting the DTC. P0449. The ECM detects the voltage on the EVAP canister vent valve control circuit is between 2.6–4.6 volts when the driver is commanded OFF. The condition exists for less than 4 seconds or for a cumulative of 30 …, This trouble code is a reference number that is given to you when you plug your HHR 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. P0449: Evaporative Emission Control System Vent Valve/Solenoid Circuit …, Before using this signal as an atmospheric reference, it must first be re-zeroed. The Diagnostic Trouble Code (DTC) will be set if the fuel tank pressure sensor voltage is less than 0.15 V for greater than 10 s. P0452 Chevrolet Code - Fuel Tank Pressure Sensor Circuit Low Voltage, Web what are the possible causes of the code p0449 chevrolet? HOW TO FIX P0449 EMISSIONS DTC ON GM VECHICLES, TAHOE, Doovi. P0449 Code Chevy Tahoe. Web when the trouble code p0449 is set, this is an indication of the evap system vent valve solenoid malfunctioning which results in more hydrocarbons being expelled., Here's why gratitude is hard... This morning I woke up later than I had planned. I had all the intention in the world to wake up between 5:00 and 5:15... Edit Your Post Publis..., The ECM detects the EVAP Vent Solenoid Valve control circuit is shorted to voltage within 0.25 s. Action Taken When the DTC Sets. DTC P0449, P0498 and P0499 are Type B DTCs. Conditions for Clearing the DTC. DTC P0449, P0498 and P0499 are Type B DTCs., This trouble code is a reference number that is given to you when you plug your S10 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. P0449: Evaporative Emission Control System Vent Valve/Solenoid Circuit Malfunction., 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 Silverado’s EVAP system, which prevents fuel vapor from being released into the atmosphere. A prevalent issue with the Chevy Silverado is the P0446 code., What the P0449 code means. The P0449 DTC means that the evaporative emission control system vent valve or solenoid has a malfunction. The ECU detects this fault and causes the Check Engine Light to be illuminated on the dashboard. What causes the P0449 code? Short or open in the wiring harness., P069E code indicates that the FPCM has identified an issue in the fuel system and is requesting the PCM turn on the check engine light. The FPCM supplies and regulates the voltage that goes to the fuel pump and the fuel pump relay. It can be a stand-alone module or a computer integrated into the PCM. Usually, the FPCM is a stand alone module., This trouble code is a reference number that is given to you when you plug your Terrain 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. P0449: Evaporative Emission Control System Vent Valve/Solenoid Circuit Malfunction., Bill Saporito test-drives the new Chevy SS, a flashback to the time of stick-shift muscle cars. By clicking "TRY IT", I agree to receive newsletters and promotions from Money and i..., Labor: 1.0. The cost to diagnose the P2119 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., There’s a tool to check the fit right there. Fuel Vapor Hose – A leak in the fuel vapor hose that leads from the fuel tank to the intake will definitely throw P0442 in your Silverado. Gas Cap Bad – A bad fuel cap can cause the P0442 code to be thrown for sure. The Silverado will typically be warning you to tighten the fuel cap., Code P0449 (EVAP) Vent Solenoid REPLACEMENT 2010 and up CHEVY CAMARO~ QUICK FIX~ In this video ill show you how to change your evap vent solenoid with out ha..., OBD-II Code P0449 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 ..., Quick overview of causes and fixes P0449 OBDII error code GMC and Chevy. “Evaporative System Vent Control Circuit Malfunction.”Read here for more informatio..., P0449 is a general OBD2 diagnostic trouble code indicating an issue with the EVAP vent control circuit. This code may be seen with other EVAP system codes. What the P0449 …, Jun 27, 2022 · A scan tool will display the commanded state of the EVAP Vent Solenoid Valve as Not Venting (On) or Venting (Off). The Diagnostic Trouble Code (DTC) will be set when the ECM detects the EVAP vent solenoid valve control circuit is open within 0.25 s. P0449 2015 Chevrolet Silverado Code - Evaporative Emission Vent Solenoid Valve Control Circuit. , Sep 15, 2023 · Code P0449 is a diagnostic trouble code (DTC) that indicates a problem with the evaporative emission control (EVAP) system vent control circuit. This article explains the causes, symptoms, and fixes for code P0449, including specific information for Chevy vehicles. , Depending on year, make, and model, DTC P0498 may have number of causes. Here are some of the most common. Honda – A number of Honda vehicles, including Element, Civic, and Accord, have reported faulty vent shut valves. Replacement usually fixes the problem. However, always finish circuit diagnosis before condemning the valve itself., Oct 27, 2022 · in this video I'm gonna share with you the step by step process of how to diagnose and fix a P0449 Trouble code on a Chevrolet Traverse, Enjoy!#P0449 #evap , Labor: 1.0. The cost to diagnose the P2119 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., Car: 2019 Chevrolet Malibu 1.5L LT. Mileage: Approximately 80,000 miles. Problem: Check Engine Light (CEL) illuminated with DTCs P0449 and P0455. DTC (s): P0449 EVAP vent solenoid valve control circuit, P0455 EVAP system large leak detected. Solution: Replace vent valve wire harness, PN 84944780 (supersedes 84427106), What are the Possible Causes of the DTC P0449 Hyundai? NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes. Purge Control Valve harness is open or shorted. Purge Control Valve electrical circuit poor connection. Faulty canister vent control valve.