Question about 1998 Buick Century

2 Answers

Evap leak in fuel

Auto zone said i had a evap leak how can i fix it

Posted by on

  • Denny152 Dec 02, 2008

    I have had a problem with the check engine light since my 1998 Mazda Protege was new. Dealer said that it just went on because of fuel cap.
    Had the code printed out from Auto Zone and it says that it is and Evap leak. I have replaced the fuel cap. I believe in the past that I have replaced the cat.
    Will the emission system smoke test tell me if it is the cat if it went bad?



2 Answers

  • Level 1:

    An expert who has achieved level 1.

  • Contributor
  • 1 Answer

The the plastic that the cap goes in . that is in the gas tube . will leak around where it is presses in you will find a little rust on the tube just inder the cap causing a small leak . just had one done. with smoke test. blamed new cap till we found the rust around the tube to plastic where the cap goes into . a ridge of rust . so a small leak. need to replace tube or seal the tube/ plastic just inside gas opening .

Posted on Jul 31, 2012

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points


    An expert that got 10 achievements.


    An expert that got 5 achievements.

    Vice President:

    An expert whose answer got voted for 100 times.

  • Master
  • 702 Answers

Remove the gas cap and re-install it making sure that you hear it click several times. What your evap leak could be is the gas cap allowing gas fumes to escape. All it takes is a .040 leak to turn on the engine light. If it persists you'll have to have the emission system smoke tested. What happens is the system is literally filled with smoke and the leak will be found by where the smoke comes from.

Posted on Nov 23, 2008


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

Car jerks going uphill

Maybe! Check your air filter, also go by auto zone, or O'Reilly Auto Parts, have them to check the engine code, it's free! Could be a bad oxygen flow sensor, or other sensor causing this! and you really need to fix that leak. hope this helps!

Apr 02, 2016 | Cars & Trucks

2 Answers

Check engine light came on diaognsics say leak

Evap system has many parts , cannister,vent and purge valves ,fuel tank and cap, first is the fuel cap on and is the seal in good shape. You will need to inspect all vauum hoses that leave the cannister if all ok then get the valve and solenoid tested for stuck open

Apr 19, 2014 | 2009 Chevrolet Silverado 1500

1 Answer

My 2006 canyon is skipping. error code p0455 showed@ auto zone. will an evap leak cause the skipping?

Gross leak in the Evap System
Yes-- when the purge valve is commanded on
you are just pulling out fumes & burning them
You have a major vacuum leak, thus a leaning
of the fuel mix & cylinder misfires
Two different systems, hard to get if don't know
about that stuff

Aug 12, 2013 | Cars & Trucks

1 Answer

I have a pontiac g6 that i just bought its a 2007 and it told me earlier to check my gas cap which i did then my check engine light came on and wont come off we went to auto zone and the machine said that...

An Evap leak in a car is usually fuel fumes leaking from the evap system. The purpose of the system is to expel pressure built in the gas tank, collect the fumes, and then at the right moment, purge the fumes into the intake to be burned. On newer cars, a leak in the system will set off the check engine light. The leak doesn't have to be big... in fact, it can be tiny. As in, can't see with the naked eye, tiny. A smoke machine is usually used to find the leak. A popular cause of an evap code is a loose gas cap, as the gas tank and filler neck itself are part of the system.

Aug 26, 2010 | 2008 Pontiac G6 Sedan

2 Answers

My engine lite is on and took it to auto zone they checked it and said it was p0455 evap emission control system system leak, do i fix it without taking it to a shop?

Do you know where the leak is ,or what is causing it?
Check all the EVAP hoses in the system.
Pretty hard to test without,pressure,vacuum or smoke machine and system knowledge

May 04, 2010 | 2004 Chevrolet Monte Carlo

4 Answers

Check engine light on any way to get code off car without bying scanner

Yes, some Auto Parts stores will scan it for free. Check with Auto Zone, Advance, & other auto parts stores in your area.

Sep 01, 2009 | 2002 Ford Mustang

1 Answer

My check engine light came on on my dodge truck so I took it to get a free computer reading at auto zone & it showed that I have an evap valve leak! A small on as well as a large one, anyone know what...

in reference to the evap leak, it very well could be your filler neck. it could have rusted a hole in it. look underneath where you fill your gas and see if there is rust or if you smell gas the small one could be the evap cannister

Jun 20, 2009 | 2001 Dodge Ram 2500 Truck

2 Answers

Mil comes on and has a code of p442. what does that mean

It means you have a leak in the EVAP system. Most likely the hoses near the charcoal canister. Check the EVAP hoses for cracks, and replace as necessary.

Jun 03, 2009 | 2003 Dodge Dakota Club Cab

1 Answer

Error codes PO135, PO449,PO442


P0135 - Heated Oxygen Sensor (HO2S) Heater Performance Bank 1 Sensor 1
P0449 - Evaporative Emission (EVAP) Vent Solenoid Control Circuit
P0442 - Evaporative Emission (EVAP) System Small Leak Detected

Mar 23, 2009 | 2003 Chevrolet Silverado 1500

1 Answer

A leak in my exhaust

duh...why didn't you ask them?  How can we determine cost if we have no idea where the leak is.

Mar 17, 2009 | 2004 Dodge Stratus

Not finding what you are looking for?
1998 Buick Century Logo

653 people viewed this question

Ask a Question

Usually answered in minutes!

Top Buick Experts


Level 3 Expert

81285 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