Question about 1999 Buick LeSabre

1 Answer

Request to know the code for P 0440, which shown on scanner?

Posted by on


1 Answer

  • Level 1:

    An expert who has achieved level 1.


    An expert that hasĀ over 10 points.

    Problem Solver:

    An expert who has answered 5 questions.

  • Contributor
  • 10 Answers

Evap emmision malfunction

Posted on Mar 28, 2011


1 Suggested Answer

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi there,
Save hours of searching online or wasting money on unnecessary repairs by talking to a 6YA Expert who can help you resolve this issue over the phone in a minute or two.

Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.

Here's a link to this great service

Good luck!

Posted on Jan 02, 2017


Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

1 Answer

My miles per gallon dropped from 20-22 to 15-16. Diagnostic code 0440 be the result of this drop?

We will need to know the year, make, model, and mileage of your vehicle to start, then it will be really helpful if you could give us a service history.
God bless your efforts.

Jun 07, 2018 | Cars & Trucks

1 Answer

Error 55 on daikin ducyed system

No make, model, or year shown, but on many pre-OBDII models (before 1995), the code 55 (or five blinks, five blinks) meant NO trouble codes. It was a method to let you know your request was received, but it had nothing to report.

Feb 16, 2017 | Cars & Trucks

1 Answer

I have a 0440 and a 0456 code on the car and am

Hi, try this link
Good luck

Nov 28, 2009 | 2003 Dodge Durango

2 Answers

SES light (again!)

P0440 code is EVAP control system problem.This has to do with emissions from the carbon can, fuel tank and general leaks that come from fuel evaporation. Anywhere gas fumes can escape the systerm. This code is very common and can be caused by a simple fuel cap being loose or leaking. Check the fuel cap and reset the coputer. If the SES light comes back on there could be a problem with some of the systerm controls. ie vent valve,purge valveand canister. And /or vac leaks.

May 26, 2009 | 2003 Saturn VUE

1 Answer

Code 0440 or P0440

p0440 is typically an evaporative emissions code. What that means is gas in your tank evaporates and there is a system (evap system) set in place to manage those evaporations. This system monitors gas tank pressures and releases pressure accordingly. By monitoring pressures it can sometimes be set by leaving the gas cap a little loose after filling up. So the first thing I would check is make sure your cap is tight and get that code cleared out somewhere like a local parts store for free and see if it comes back on.

Apr 18, 2009 | 2004 Chrysler Sebring

1 Answer

Code 0440 2004 sunfire

Hello tiasr06,

The problem is the purge solenoid or the purge vent. I would change both of them and your problem will go away. The purge solenoid is located near the power steering pump and the purge vent is under the car, in the back, behind the gas tank on the driver's side.


Mar 21, 2009 | 2004 Pontiac Sunfire

1 Answer

Check engine light is on

P0159 is a 'request" code to check the Trasmisiom Control Module for another code for the TCM sensor codes. you may have to take it to a transmission shop.

Feb 06, 2009 | 2001 Hyundai Sonata

1 Answer

Code 0440

P0440 onepx.gif EVAP Control System Malfunction onepx.gif onepx.gif onepx.gif onepx.gif onepx.gif onepx.gif onepx.gif onepx.gif Possible Causes onepx.gif Setting Conditions onepx.gif onepx.gif onepx.gif onepx.gif
  • Charcoal canister is clogged, loaded with fuel or with moisture
  • Fuel filler cap missing, loose (not tightened) or the wrong part
  • Fuel tank over-fill check valve cracked or damaged
  • Fuel tank seal leaking, fuel tank cracked or damaged/leaking
  • Fuel vapor hoses/tubes blocked or restricted, or fuel vapor control valve tube or fuel vapor vent valve assembly blocked
  • Vacuum hose or tubing cracked, damaged or disconnected
  • Vapor Pressure sensor incorrectly installed
  • PCM has failed
onepx.gif Engine started cold (ECT sensor signal less 86�F), engine runtime over 20 minutes in closed loop, vehicle driven to a speed of 55-60 mph, and the PCM detected the fuel tank pressure indicated the same value as the atmospheric pressure in the EVAP Monitor test.
This code sets in 2 Trip(s).First I would try making sure the gas cap is tight. You need to give it 2 trips before it may reset. The other choice would be to replace it, Cheaper than spending money on a professional.

Jan 25, 2009 | 2002 Lexus IS 300

2 Answers

Car codes

When you have P0440, P0441 and P0446, it is a very good bet that the fuel cap was loose, or the fuel cap rubber seal is compromised. You will get all three of those codes every time that the cap is loose. Always make sure that the fuel cap is as tight as you can get it after you refuel.

Nov 05, 2008 | 2001 Lexus RX 300

3 Answers

2002 dodge intrepid 2.7L

Rather than electrical, have had any thought about a leaky head gasket or cracked head?

Sep 15, 2008 | 2002 Dodge Intrepid

Not finding what you are looking for?
1999 Buick LeSabre Logo

Related Topics:

54 people viewed this question

Ask a Question

Usually answered in minutes!

Top Buick Experts


Level 3 Expert

80531 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22326 Answers

Ronny Bennett Sr.
Ronny Bennett Sr.

Level 3 Expert

6927 Answers

Are you a Buick Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides