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Want does p0440 code mean - Astro Chevrolet Cars & Trucks

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P0440 - Evaporative Emission (EVAP) System

This indicates that a part of the EVAP control system is no longer functioning correctly. The EVAP system consists of many parts, including (but not limited to) the gas cap, fuel lines, carbon canister, purge valve, and other hoses. The (EVAP) emission control system prevents the escape of fuel vapors from a vehicle's fuel system. Fuel vapors are routed by hoses to a charcoal canister for storage. Later, when the engine is running a purge control valve opens allowing intake vacuum to siphon the fuel vapors into the engine.

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Posted on Apr 23, 2009

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Evaporative emission system malfunction. Could be something as simple as the gas cap wasn't tightened properly, or a hose to the evap canister that has cracked. If you can't see it, you may have to find a shop with a smoke machine. They inject fog into the system and look for leaks. Try the gas cap first, it must be tight and then driven long enough to reset the computer.

Posted on Apr 23, 2009

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SOURCE: what is a code P0440?

I beleive this code is to do with the evap system/ this is where the fuel fumes are stored and then recycled through a charcaol cannister etc.
This system works mostly on vacuum related pipes so can be caused by something as simple as the fuel cap rubber perished or not put back on tight enough. I even had a car throw up this code because the dipstick wasnt properly in and seated properly, so check these along with any vacuum pipes perished.

Posted on Dec 01, 2013

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1 Answer

F411 &give f440 codes, dealer does not want to reveal meaning


Hello,
Your error code of F411 appears to be not a valid code!
However,
The error code F440 stands for Evaporative Emission Control System Malfunction

Read more this problem at: http://www.obd-codes.com/p0440
Copyright © OBD-Codes.com
P0440 OBD II Trouble Code

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Read more: http://engine-codes.com/p0440_chevrolet.html#ixzz3Jq4J1Kp1

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You may need a repair shop. Code 440 means the computer has found a leak in the venting system for the gas tank.
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I need to know what p0440 means


The technical meaning of the code is Evaporative Emission Control System Malfunction.

P0440 EVAP System No Flow can occur during the following conditions:
Fuel filler cap might be loose
  • Leak in the fuel tank, fuel filler neck or fuelsending unit 'O' ring.
  • PCM might have failed.
  • Purge vapor line might have clogged.
  • Purge or vent solenoid power circuit is open .
  • Fuel tank pressure sensor is damaged, disconnected or it failed.
  • Charcoal canister is filled with fuel or moisture.

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What does code P0440 mean?


This should help explain - http://repairpal.com/OBD-II-Code-P0440

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You have to have one of the parts stores clear it. Did you check you gas cap. P0440 Is an emissions codes usually caused from a loose gas cap

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