Question about Buick Century

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P0440 code on a buick centry 2000 what could the problem be?

Buick centry 2000, 4 door sedan 3.1 engine, gas cap is ok, need to know what other problems it could be

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Google your OBD Codes

TYPE: OBD PO440

Posted on Nov 13, 2014

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Posted on Jan 02, 2017

maygemini
  • 147 Answers

SOURCE: Check engine light on. Code P0440.

wow thermostat >>>> shucks i believe its evep emissions code like faulty gas cap ....you can reset any computer the chck eng light will come on in 50 to 100 miles if not fixed....

Posted on May 08, 2009

  • 973 Answers

SOURCE: p0440 Service Engine Soon light

Here are some possible causes and fixes http://www.obd-codes.com/p0440

Posted on Jun 17, 2010

onejesse
  • 6 Answers

SOURCE: How to reset Service Engine Soon light after replacing gas cap? Took to AutoZone when the Service Engine Soon light came on Error code P0440.

Disconnect the negative battery cable for 30 minutes. Reconnect after and the code will clear. However if the problem persists, the code will come back with in 20 miles or 30 minutes.

Posted on Aug 02, 2014

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How to reset Service Engine Soon light after replacing gas cap? Took to AutoZone when the Service Engine Soon light came on Error code P0440.


Disconnect the negative battery cable for 30 minutes. Reconnect after and the code will clear. However if the problem persists, the code will come back with in 20 miles or 30 minutes.

Aug 02, 2014 | 2000 Buick Regal LS

1 Answer

I have check engin with code P0440


"Evap system malfunction, large leak". Gas cap is off or leaking, or vent line is disconnected or leaking, or charcoal canister is damaged and leaking, something closely related to that.

Jul 30, 2014 | Cars & Trucks

3 Answers

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.

Mar 16, 2011 | Buick LeSabre Cars & Trucks

2 Answers

I just had my oil changed and put 4 new tires on my1999 Buick Regal at Walmart, my service engine light was not on before they took care of these services, but is directly after. I went to Advance Auto and...


P0440 Evaporative Emission Control System Malfunction, could be just a coincidence, I have seen it happen, and the mechanic always get the blame, if the oil plug fell out, then I would blame them. It could just be a hose off or something minor that was overlooked, like the gas cap not tight enough. Look up the code here and see what it says, Hope this helps.

Feb 16, 2011 | 2000 Buick Regal

1 Answer

I am getting P0440 EVAP Control System Malfunction for my Buick Century 1999 and need to know how to fix it thanks


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. 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 purge solenoid
  • Check and/or replace the sensor
  • Check and/or replace the purge valve
  • Have a professional use a smoke machine to detect leaks

Keep us updated.

Nov 15, 2010 | 1999 Buick Century

1 Answer

Error code P0440 on a Buick Park Avenue, year 2000


It's an Evaporative Emission Control Malfunction. Sometimes as simple as a new gas cap. If you recently put gas in your car and left it running while doing it, this would give you that code

May 12, 2010 | 2000 Buick Park Avenue

4 Answers

2000 Saturn SL2-" Service engine soon light" won't go out, even after having oil changed. Any ideas? Advance Auto's light says code: P0440.


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

Aug 20, 2009 | 2000 Saturn SL

1 Answer

Code p0440


P0440 is a EVAP leak detected, try changing the gas cap and reseting the ECM to clear the service engine light. If you can not clear the code it takes about three start up with out any issues to clear the code and after 100 start up's the codes will clear from the ECM's history. Note use the GM OEM gas cap for a replacement, anything else is just garbage and you'll be replacing it again with in 6 months. If it's not the gas cap, need to take it to a garage and have them do a smoke test to locate the leak in the system. Good luck and hope this helps, keep me posted. be glad to help

Jun 08, 2009 | 1998 Buick Century

2 Answers

Check engine light on. Code P0440.


wow thermostat >>>> shucks i believe its evep emissions code like faulty gas cap ....you can reset any computer the chck eng light will come on in 50 to 100 miles if not fixed....

May 07, 2009 | 2001 Buick Regal

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