A somewhat typical issue through the Chevy Blazer is the P0449 code. This code references a number that is provided to you as soon as you plug it into a OBD2 scanner. P0449 encounters the evaporative emissions manage (EVAP) system. It often appears with, or is related other codes, such together P0420, P0446, and an extremely often P0455.

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P0449 is normally not an prompt threat to the drive-ability of your Blazer. Certainly anytime the business engine shortly light is on, it’s an excellent to address it as shortly as possible though. Also, a really great scanner will aid you identify whether or no the vent valve is operation correctly. Most shops have actually these scanners. There’s a connect towards the bottom the web page on exactly how to execute a high quality diagnosis v a scan tool.

Chevy Blazer P0449 Definition

P0449 is a global OBDII problem code. This method that nevertheless of which do or model of vehicle, the password will mean the same thing (Blazer or not, as long as that was produced after 1996).

P0449 indicates that the valve or solenoid circuit the controls the evaporation device is no functioning properly. The EVAP system cycles fuel vapor native the gas tank right into the input manifold, a charcoal canister, or directly into the air depending on the version of vehicle. When this system malfunctions, the fuel vapor is not being encountered properly.

The ECM (Engine regulate Module) of the automobile has detected that there is a error in the circuit which controls the vent the releases the fuel vapor from the system. This will be adhered to by the organization engine quickly light.

Chevy Blazer P0449 OBDII password Symptoms

The business engine quickly light is frequently the just sign the the P0449 code has been motivated

P0449 code will generally not be accompanied by any kind of noticeable symptoms various other than the smell the gas and also the service engine soon light. Friend may notice the slightest dip in fuel economy as well.

You need to particularly notification the odor of fuel approximately the fuel tank area or fuel filler tube.

The EVAP device deals straight with fuel vapors. If this vapors room leaking from the system, you’ll often smell castle faintly while operating the vehicle.

Blazer P0449 Trouble code Causes

There are plenty of things the can cause the P0449 trouble code to cause in your Chevy Blazer. Right here are the most usual problems that will certainly throw the code in addition to a great video on the entirety process:

EVAP system Hose– The hose that carries the fuel vapor native the fuel tank to the intake manifold can begin to leak. This will cause the P0449 code. Look because that either a tear or feet in it. This is one of the most usual issues that causes this code. The hole can be an extremely tricky to discover without a acting test. Fuse/Wiring Problems– If the wiring going to the valve has actually been compromise, it’ll lead to the P0449. Fuel Tank sending out Unit– that is possible for the gasket that attaches the fuel sending unit to the gas tank to go bad. This deserve to reduce tank pressure and also throw the code. This should absolutely not be the ar to start. Fuel Filler Neck– over there is frequently a gasket whereby the fuel filler neck connects with the gas tank. This gasket have the right to dry out, especially with vehicles that invest their time in dry climates. When it dries out, the fuel tank can’t hold pressure anymore, it might erroneously throw P0449.

P0449 Diagnosis- Chevy Blazer

A mechanic has actually a wide selection of tools at his (or her) disposal to diagnose what would certainly be leading to the P0449 in her Chevy Blazer. Right here are the most common things that room done come diagnose the code:

The mechanic will examine the gas lid to make certain that it deserve to handle pressure. If girlfriend are obtaining a warning the your gas lid is off, even when it’s on, instead of it will more than likely clear this code. The mechanic will typically examine to check out if over there are any kind of other problem codes. The an ext trouble codes there are, the much easier it deserve to be come diagnose a problem. That’s because when they show up together in particular combinations, over there will frequently only be only a few conditions that will throw any combination of password at one time. After ~ ascertaining what problem codes show up with the P0449, the mechanic will typically check the EVAP system
. This contains the purge valve, line, and also canister. The fuel tank press will be checked and also monitored. After for the checks and fixes detailed above, the mechanic will execute two tests: A exhilaration test, and they’ll usage a scan device to confirm that the EVAP solenoids and also valves space operating properly.

Still having actually trouble? Here’s a super technical video that is super in-depth on diagnosing P0449.

Most usual P0449 Fixes


Here room the most usual Blazer P0449 fixes:

Gas cap replacement EVAP heat replacement Vent valve instead of Wiring fix

Of all the items detailed above, it would certainly be wise to begin with the gas cap and work your method to the fuel tank, since the gas lid is far and away the easiest and least expensive item to change on here.

Here’s a good video on how to test your gas cap.

Good lucky figuring the end what is bring about your Chevy Blazer to throw the P0449 code. Us hope this helps. If over there is anything that you feel favor you could add, you re welcome feel complimentary to leaving a comment below.

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Is P0449 a severe Concern?

While P0449 is not going to reason the Blazer’s engine to prevent running, it have to not be cure lightly. You could have a fuel leak. Salary extra fist to her tank level and also make sure you room not leaking fuel. We recommend taking it in and/or dealing with it best away.