Question about 1999 Buick Century
Put new gas cap on, but check engine light is still on.
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Posted on Jan 02, 2017
SOURCE: code p0449.
GM uses an EVAP solenoid that is located under most vehicles near the gas tank and connects to the charcoal filter can. Codes can be set and will drive you crazy trying to figure out if you have a bad gas cap, broke lines---this is where they try to get you to do a smoke test, or you just think the vehicle is no good! Relax, it is usually an easy fix and one GM has known about for years but continues to make easy money off people who cannot do basic maintenance. Now one code that comes up is usually P0449, along with maybe a warning to check the gas cap to see if it is on tight! GM will gladly read this code out for you for around $98.00 and then fix it for another around $100.00 which includes the EVAP part which if you buy at their parts dept. will cost you $32.00 and my dealership parts man told me they sell one a day! It is easy money for them and obviously a defective part they keep using for the last 10 or 15 years but hey, its money in their pocket. Here is how to fix it with ONE single common screwdriver! Get under the vehicle after putting on the parking brake. The EVAP solenoid is easy to spot near the gas tank and it has one electric connector which disconnects by releasing the plastic clip and pulling the connector out. It also has ONE air line connected which goes to the charcoal cannister which also can be removed with the one screwdriver. The whole EVAP solenoid and air can can be removed with the screwdriver which makes it easier to unplug the electric and air line. Get a replacement from the dealer as they certainly are familiar with this part as they sell LOTS of them. Then just go under and plug the new one in and the problem is solved. Now if you do not have a tool to reset the codes, try the local parts places as most of them will do a reset for you.
Posted on Jan 24, 2010
Testimonial: "thanks alot.i appreciate all your help .the explanation was very good.gonna go by dealer to get the part.ill let u know how it turned out."
Change the evap vent solenoid canister located near the master cylinder on the right side of the engine or your hoses may be cracked. Good luck!
Posted on Mar 12, 2009
If there was a leak at the gas cap. EG: Left off or loose after fill up? You will need to have the codes cleared or it will clear itself after enough key cycles. EG: Started and shut back off as many as 20 to 50 or more times.
Posted on Jun 01, 2009
It isn't going to hurt anything unless your fuel tank is leaking fuel. In which case you should get it fixed.
It could be a fuel cap and if it seems loose or worn you should replace it anyway. It may cure the problem.
It may take a while for the light to turn off though, as it will need to run the test and pass before it goes out.
If you need more help, leave a message and I will return to assist.
Posted on Jan 24, 2010
Testimonial: "If it is my fuel tank leaking, how would I know. Would I smell gas?"
Check engine light comes on when the computer detects a malfunction in the emision control system, could be a loose or broken vacumm line, loose gas cap or a sensor.
Drive your vehicle to an AutoZone store, ask them to retreive the trouble codes from your computer memory, they will do that and a print out of the codes and their meaning. This a free service they provide for their customers.
Don't forget to rate this answer. Good Luck
Posted on Apr 27, 2010
Testimonial: "Thanks for quick and pin point reply that will save me money. I already had replaced gas cap from a previous episode."
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