Po440 code chevy

Now let’s conclude this article about the P0440 Chevy code. Conclusion To P0440 Chevy. In this article, we have covered quite a bit when it comes to the P0440 Chevy. First, we learned the basics of car diagnostics and learned how this procedure is performed on modern vehicles. Then, we elaborated on the problem and learned how it is ...

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 ... While some trouble codes leave vehicle owners with a plethora of possible causes, the P0449 code likely only has one of three possible causes. First, the vent valve in the evaporative emissions system might be faulty. Second, the connection, wires, or circuits in the system might be having a connectivity issue that is causing a false reading.How do you troubleshoot code P0440 ? Because of the complexity of the EVAP system and the expense and availability of EVAP-specific diagnostic tools, you may be limited to a visual inspection of the system. ... Chevy. Model: s10. Year: 2002. Miles: 164474. Engine: 2.2. 0. Reply. colin. 4 years ago. gas cap 97 chevy lumina 3.1 liter base …t02owner · #7 · Sep 14, 2009. P0440 on my 2002 Tblazer LT. My t-blazer is a 2002 LT. Curious if anyone knows enough about the EVAP system to help answer some questions. For the past month or so I have had the P0440 code come on. I reset it from time to time only to have it return a few days later ( sometimes maybe a week).

P0441 is an EVAP control system powertrain diagnostic trouble code. It is only set on vehicles that can ‘monitor’ if the ‘purge flow’ is correct or not. Most all with a few exceptions are equipped with either a Purge Flow Sensor or Leak Detection Pump. This code indicates the EVAP control system is not functioning correctly.C. chevy1500 Discussion starter · Oct 10, 2010. i have a 2002 chevy 1500 silverado z71 with 105,000 miles. the SES light keeps coming on with code p0440. code p0446 came on before code p0440 and that code was the tank vent sensor so i cleaned that and it went away for like a month, then it came back on with code p0440. i replaced …A code P0440 could mean one or more of the following has happened: The gas cap is not installed or working properly. The purge solenoid has failed. The canister is plugged and not working properly. Possible Solutions. With a P0440 OBD-II trouble code, diagnosis can be tricky at times.The P0440 code is a common trouble code that many Chevy HHR owners may encounter. It indicates that there is an issue with the car’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 damaged fuel tank filler cap.The canister is plugged and not working properly. With a P0440 OBD-II trouble code, diagnosis can be tricky at times. Here are some things to try: Remove and reinstall the gas cap, clear the code, and drive for a day and see if the codes come back. Inspect the EVAP system for cuts/holes in tubes/hoses.C. chevy1500 Discussion starter · Oct 10, 2010. i have a 2002 chevy 1500 silverado z71 with 105,000 miles. the SES light keeps coming on with code p0440. code p0446 came on before code p0440 and that code was the tank vent sensor so i cleaned that and it went away for like a month, then it came back on with code p0440. i replaced the gas cap ...A P0440: Evaporative Emission Control System Malfunction means that there's a fuel vapor leak somewhere in the EVAP system. Unfortuately, this trouble code does not pinpoint a specific component as the cause of the EVAP system failure. Common Symptoms Of A P0440 Trouble Code. A P0440 will cause the vehicle to fail an emissions test. Usually ...

Code P0440 causes the Check Engine Light to go on and this alone will cause a failed emission test. The code means the fuel vapor system has a vapor leak somewhere in the system and vapors can be very flammable and dangerous to breath the vapors.Diagnosis of a P0440 Evap Code on a 2001 Buick Park Avenue.Video of Evap Vent Solenoid on a 2005 Chevrolet Suburban: https://youtu.be/dm-Sj8xwxaMDisclaimer:D...hey all once again back with a question, got a check engine light, came back with a p0440 code, some sort of evap malfunction, any clues on where to look... in this thread in this sub-forum in the entire site. Advanced Search Cancel Login / Join. ... Chevy Impala 7th Gen Discussion p0440 code. 10345 Views 2 Replies 2 ...What is the Cost to Diagnose the Code P0440? Labor: 1.0. The cost to diagnose the P0440 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.The P0440 code is a common trouble code that many Chevy S10 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 damaged fuel tank filler cap.Chris (aka-Moose) Technician. 4,140 satisfied customers. I have a 2001 Chevy S10, 4.3, AT with 52,000 orig miles. I have a 2001 Chevy S10, 4.3, AT with 52,000 orig miles. Check engine light just came on, with codes C0236 (rear wheel speed signal) and P0440 … read more.

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AUTOMATIC. 150,000 MILES. Hi. My vehicle has the p0440 code and no other codes. I have changed already gas cap, filler neck, both solenoids and charcoal canister also. But I still have the code and check engine light. We used pressure air to see if the pressure sensor is working and it's working. I am out of ideas and don't know what to do next.Mar 19, 2018 · Verify the scan tool fuel level remaining parameter accurately matches the fuel level gauge and the fuel tank is not overfilled. TSB 00-06-04-011A: Info - Evaporative Emissions DTC P0440, P0441, P0442, P0446 - (Oct 4, 2001) Diagnosis: 1. Ignition ON and fuel cap removed, verify the Fuel Tank Pressure (FTP) parameter is 0.0 in. H2O, ±1.0 in. H2O. i get a po440 and a po440 pd code i have a 2000 malibu. i get a po440 and a po440 pd code when i hook up the obd - Chevrolet 1998 Malibu question. Search Fixya. Browse Categories Answer Questions ... What does code 440 mean on a 2000 Chevrolet Malibu. P0440 - is a large EVAP leak. The EVAP system stores fuel vapor from the fuel …THERE IS A CODE OF PO440. I HAVE CHECKED THE WIRING HARNESS IN REAR, IT IS O.K. WHEN I - Answered by a verified Chevy Mechanic ... chevy suburban,4wd,6.0 2500 series.hard to fuel tank takes about18 gallons clicks off showing only 3/4 full.i have duel tank set up.do not know capacity of either tank.tried different stations …Donate. Search forums. Log in Register. Ok, got the P0440 code on my son's Trailblazer. No other codes. Tried the easiest, gas cap. Cleared the code. Lasted about 1 day and is back. The code isn't very specific which stinks.In this video we have a look at a 2002 Chevrolet 1500 5.3 4x4 that came in with codes, P0440, P0442, P0449, P0453 indicating a problem in the EVAP System. Qu...

OBD-II code P0440 represents a general fault in the Evaporative Emission Control (EVAP) System. Basically, this code means that something in the EVAP system is broken. Another code will typically accompany P0440, often in the P044X chain (where "X" represents any number). Get your OEM filler cap here.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 ...August 11, 2018 by Jason 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.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 P0440 code is a common trouble code that many Chevy Venture owners may encounter. It indicates that there is an issue with the van’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 …Apr 23, 2010 · 2002 Chevy Trailblazer w/101,000 mi has the P0440 OBD II Code. Just replaced the plugs with Iridiums @ 100K, all connections are good and gas cap is seated properly . . . help!!! AUTOMATIC. 150,000 MILES. Hi. My vehicle has the p0440 code and no other codes. I have changed already gas cap, filler neck, both solenoids and charcoal canister also. But I still have the code and check engine light. We used pressure air to see if the pressure sensor is working and it's working. I am out of ideas and don't know what to do next.The P0440 code is not an emergency code because it doesn’t affect how safely you can drive the car. But it could make your gas mileage go down. If you have the P0440 code and are about to take a new emissions test, you will fail.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 ...

The P0440 code is a common trouble code that many Chevy Cavalier owners may encounter. It indicates that there is an issue with the car'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 damaged fuel tank ...

1999 Chevy Blazer 4.3L Current codes: P0101 Mass Airflow Circuit out of range P0300 Engine Misfire P0410 Secondary Air Injection System P0440 Evap Emissions System Fault P1416 Air System Fault (bank 2 …You’ve found a gorgeous 1955 Chevrolet Bel-Air for sale. If you want to find out as much information about the car before purchasing it, start with the serial number. Here is some information below on how to find the number and what the pos...Jan 20, 2019 · The P0440 code is a common trouble code that many Chevy Venture owners may encounter. It indicates that there is an issue with the van’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 damaged fuel tank filler ... The P0440 code means that the control module has detected a leak in the Evaporative Emission (EVAP). A loose fuel tank filler cap is the most common cause that triggers the P0440 code. User Submitted Video. Check if GMC has issued a Factory Service Bulletin for the P0440 code (2013 - Up Models): → Check here.Aug 11, 2018 · The P0440 code is a common trouble code that many Chevy Monte Carlo owners may encounter. It indicates that there is an issue with the car’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 damaged fuel tank ... The canister is plugged and not working properly. With a P0440 OBD-II trouble code, diagnosis can be tricky at times. Here are some things to try: Remove and reinstall the gas cap, clear the code, and drive for a day and see if the codes come back. Inspect the EVAP system for cuts/holes in tubes/hoses.To diagnose the P0430 Chevrolet code, it typically requires 1.0 hour of labor. The specific diagnosis time and labor rates at auto repair shops can differ based on factors such as the location, make and model of the vehicle, and even the engine type. It is common for most auto repair shops to charge between $75 and $150 per hour.Dec 2, 2015 · 2002 Chevy Silverado 1500: 5.3L..p0440 - evap System Code I have a 2002 Chevy Silverado 1500, 5.3L engine with about 133000 miles on it. I keep getting the P0440 - Evap System Code. Mar 19, 2018 · Verify the scan tool fuel level remaining parameter accurately matches the fuel level gauge and the fuel tank is not overfilled. TSB 00-06-04-011A: Info - Evaporative Emissions DTC P0440, P0441, P0442, P0446 - (Oct 4, 2001) Diagnosis: 1. Ignition ON and fuel cap removed, verify the Fuel Tank Pressure (FTP) parameter is 0.0 in. H2O, ±1.0 in. H2O.

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Repairing a trouble code P0440 involves finding and replacing the component with the fuel vapor leak. The vacuum hose …The code P0440 is triggered when the engine control module (ECM) detects an issue with the pressure of your vehicle's Evaporative (EVAP) Emission Control system. The P0440 code could correspond to a leak present in the fuel tank vapor system, or a malfunction in one of the system's vapor pressure sensors. The Evaporative (EVAP) Emission Control ...Dec 12, 2022 · The P0440 code means that the control module has detected a leak in the Evaporative Emission (EVAP). A loose fuel tank filler cap is the most common cause that triggers the P0440 code. User Submitted Video. Check if Chevrolet has issued a Factory Service Bulletin for the P0440 code (2013 - Up Models): → Check here. The P0440 code is a common trouble code that many Chevy Equinox owners may encounter. It indicates that there is an issue with the vehicle'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 damaged.If it is paired with P0441, P0440, and/or P0446, there is most likely a solenoid failure, leaking charcoal canister, or a more complex EVAP leak. STEP 2: CHECK YOUR GAS CAP. Luckily this first part takes a couple minutes to check. Inspect your gas cap to see if it is loose or damaged. If your gas cap is loose, tighten it and clear the code.The P0440 code is a common trouble code that many Chevy S10 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 damaged fuel tank filler cap.Re: 2000 cavalier check engine light code po440. P0440 - Evaporative Emission Control System Malfunction A bad or incorrect gas cap can cause it. Bad charcoal canister, bad piece of hose somewhere. Start with the easiest. Go to the dealer and get a new cap. Pay more, make sure you get the right thing.17 Mei 2010 ... I recently got a code p0440 showing evap malfunction,then a p0442 showing evap small leak.Does anyone know where to start and most important ... ….

2003 Chev Trail Blazer. Codes: PO440, P151 & P1481 pull up. what are they? - Chevrolet 2003 TrailBlazer questionWells EVAP Training with Sgt Tech P0440 P0441 P0442 etc. This DTC tests the evaporative emission (EVAP) system for a restricted or blocked EVAP vent path. The control module commands the EVAP canister purge solenoid Open and the EVAP canister vent solenoid Closed. This allows vacuum to be applied to the EVAP system.The P0442 engine code indicates a problem with your car’s evaporative emission control system, which is responsible for preventing fuel vapors from escaping. These vapors are usually collected in a charcoal canister and burnt off by the engine.Possible Solutions: with a P0440 OBD-II trouble code, diagnosis can be tricky at times. Here are some things to try: Remove and reinstall the gas cap, clear the code, and drive for a day and see if the codes come back. Inspect the EVAP system for cuts/holes in tubes/hoses Inspect for damaged or disconnected hoses around the Evap …1997 malibu / I had faulty code po440 . I Replaced Purge valve behind engine, canister valve solenoid, gascap oh, - Chevrolet 2001 Malibu question. Search Fixya ... 2002 chevy calvair code po440 light stays on replaced gas cap vaccum valve on top of …P0440 Evap Emission Control System Malfunction 52K views It’s cable reimagined No DVR space limits. No long-term contract. No hidden fees. No cable box. …Mar 30, 2016 · To run this test, the ECM draws a vacuum on the tank. If the ECM detects that the EVAP system is unable to produce or hold a vacuum in a certain amount of time, it records a diagnostic trouble code (DTC) in memory, P0440, “Evaporative Emissions (EVAP) Control System Malfunction,” and illuminates the MIL (malfunction indicator lamp). Code P0446 sometimes indicates that an electrical failure has been detected in either the vent valve itself or its control circuit. While the P0446 can indicate an electrical problem on later model Fords, which, for some strange reason chooses to look at the vent valve electrical circuit to set this code, the P0446 code is highly unlikely to be ... Po440 code chevy, HI, ON A 2002 CHEVY PRISM I'VE GOT 2 CODES FROM CHECK ENGINE LIGHT, P0440 AND P0442. THE FIRST THING I'VE DONE WAS REPLACE THE GAS CAP BUT THE CODE CAME BACK. WHAT ELSE SHOULD I SUSPECT OR REPLACE? ... 1996 s10 popped code p0440 freeze data has st ftrm1 at 0.0 lt ftrm1 10.0 st ftrm3 50.0 lt ftrm3 …, Aug 9, 2018 · The P0440 code is a common trouble code that many Chevy Avalanche 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 damaged. , Now let’s conclude this article about the P0440 Chevy code. Conclusion To P0440 Chevy. In this article, we have covered quite a bit when it comes to the P0440 Chevy. First, we learned the basics of car diagnostics and learned how this procedure is performed on modern vehicles. Then, we elaborated on the problem and learned how it is ..., There 2 possible cause for this a failing FTP (fuel tank pressure) sensor not reporting the true fuel tank pressure/vacuum condition. The fuel tank filler hose area has a small leak or the fuel cap. Check the purge for its vacuum connection a vacuum hose disconnected or leaking there will cause P0443 and P0440. p0440. dodge., In this video we have a look at a 2002 Chevrolet 1500 5.3 4x4 that came in with codes, P0440, P0442, P0449, P0453 indicating a problem in the EVAP System. Qu..., Verify the scan tool fuel level remaining parameter accurately matches the fuel level gauge and the fuel tank is not overfilled. TSB 00-06-04-011A: Info - Evaporative Emissions DTC P0440, P0441, P0442, P0446 - (Oct 4, 2001) Diagnosis: 1. Ignition ON and fuel cap removed, verify the Fuel Tank Pressure (FTP) parameter is 0.0 in. H2O, ±1.0 in. …, The P0440 code is a common trouble code that many Chevy Equinox owners may encounter. It indicates that there is an issue with the vehicle'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 …, Possible Solutions. With a P0440 OBD-II trouble code, diagnosis can be tricky at times. Here are some things to try: Remove and reinstall the gas cap, clear the code, and drive for a day and see if the codes come back. Have three 99 Tahoes and they all do the same thing-PO440., Apr 23, 2010 · 2002 Chevy Trailblazer w/101,000 mi has the P0440 OBD II Code. Just replaced the plugs with Iridiums @ 100K, all connections are good and gas cap is seated properly . . . help!!! , Oct 7, 2017 · The canister is plugged and not working properly. With a P0440 OBD-II trouble code, diagnosis can be tricky at times. Here are some things to try: Remove and reinstall the gas cap, clear the code, and drive for a day and see if the codes come back. Inspect the EVAP system for cuts/holes in tubes/hoses. , 29 Sep 2019 ... hey guy, well got a problem with my 1997 chevy lumina 3100 v6 118k miles the gas tank is doing a "thumping sound" like thump,thump,thump..., The P0440 code is a common trouble code that many Chevy Blazer owners may encounter. It indicates that there is an issue with the vehicle'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 damaged., Codes PO410;PO440:PT811, and check gas cap on Driver Information Pannel - Answered by a verified Chevy Mechanic. We use cookies to give you the best possible experience on our website. ... Codes PO410;PO440:PT811, and check gas cap on Driver Information Pannel. Ask Your Own Chevy Question. Share this conversation., Diagnosing and fixing p0440 Check Engine Light Chevy Trailblazer 4.2. patient is a 2002 Trailblazer 4.2 presenting with a p0440. Gas cap was already replaced and p0440 persevered., A code P0440 could mean one or more of the following has happened: The gas cap is not installed or working properly; The purge solenoid has failed; The canister is plugged and …, Now let’s conclude this article about the P0440 Chevy code. Conclusion To P0440 Chevy. In this article, we have covered quite a bit when it comes to the P0440 Chevy. First, we learned the basics of car diagnostics and learned how this procedure is performed on modern vehicles. Then, we elaborated on the problem and learned how it is ..., Aug 11, 2018 · The P0440 code is a common trouble code that many Chevy Impala owners may encounter. It indicates that there is an issue with the car’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 damaged fuel tank filler cap. , 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 P0440 code is a common trouble code that many Chevy Avalanche 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 …, Codes PO410;PO440:PT811, and check gas cap on Driver Information Pannel - Answered by a verified Chevy Mechanic. We use cookies to give you the best possible experience on our website. ... Codes PO410;PO440:PT811, and check gas cap on Driver Information Pannel. Ask Your Own Chevy Question. Share this conversation., 2000 tracker, 2.0, p0440. any common probs..new cap, and tested all solenoids. all seem to working fine - Chevrolet 2000 Tracker question. Search Fixya. Browse Categories Answer Questions . 2000 Chevrolet Tracker; Chevrolet Tracker Car and Truck ... A code P0440 could mean one or more of the following has happened: …, Jan 15, 2015 · Troubleshooting P0440, and P0443 evaporative emissions codes.2003 Chevrolet Monte Carlo.If you would like to save 20% when purchasing Amsoil products, here i... , Po440 code freeze frame data says the following rpm 1347 map kpa 44 st ftm1 0.0 lt ftrm1 3.9 st ftrm3 50.0 lt ftrm3 - Answered by a verified Chevy Mechanic ... 1996 chevy s10 po171 code eng rpm 90o Calc Speed 0mph Map KPA 35 Coolant Temo 168 ST FTRM!% 18.7 LT FTRM1% 12.5 ST FTRM3% 78.9 LT FTRM 3% 1.5 VEH SP 0 Fuel Sys …, The videos shows a quick diagnostic on how to fix the above listed codes pertaining to the cooling fans usually throwing a check engine light. Make sure all ..., 3 Jun 2003 ... Does anyone have the Chevy specific list of the OBD-II codes? Especially as pertains to the 1998 Lumina? I'm most interested in code P0440., P0440 Diagnostic Theory for Shops and Technicians. The P0440 code indicates that there is a large leak in the EVAP system, but this is somewhat misleading. What the code …, 2002 Chevy Trailblazer w/101,000 mi has the P0440 OBD II Code. Just replaced the plugs with Iridiums @ 100K, all connections are good and gas cap is seated properly . . . help!!!, P0440 definition: Evaporative Emission Control System Malfunction Issue Severity: LOW – Continued driving for a short period of time is okay Repair Urgency: Get …, File In Section: 06 - Engine/Propulsion System Bulletin No.: 02-06-04-044. Date: August, 2002. TECHNICAL. Subject: Service Engine Soon (SES) Light Illuminated, DTC P0440 Set (Replace Fuel Tank Evaporative Emissions Control System (EVAP) Vent Solenoid Harness) Models: 2000-2002 Chevrolet Cavalier 2000-2002 Pontiac Sunfire Condition. Some …, Yes, P0440, P0441, and P0446 codes are all related to the evaporative emission control system in a Chevy Tahoe. The P0440 code indicates a general issue with the system, while the P0441 code signals a problem with the EVAP system’s purge flow, and the P0446 code is related to vent control issues. While these codes are distinct, …, 17 Mar 2023 ... The P0440 code is general, meaning that the vehicle has an issue with its EVAP system, though the code will not say where. That system has many ..., A P0440: Evaporative Emission Control System Malfunction means that there's a fuel vapor leak somewhere in the EVAP system. Unfortuately, this trouble code does not pinpoint a specific component as the cause of the EVAP system failure. Common Symptoms Of A P0440 Trouble Code A P0440 will cause the vehicle to fail an emissions test., If the service engine soon light is flashing, it means the computer has detected an engine misfire with the potential of catalytic convertor failure. Don't just tune it up. Bring it somewhere they can read the trouble code. Sometimes it will designate which cylinder is having the problem. Sep 24, 2014 • 2003 Chevrolet TrailBlazer. Mar 19 ...