Q: I fixed what was wrong but check engine light wont turn off

asked by on September 19, 2017

I need to pass a echeck to renew my plates but my check engine light is on i went and failed to see what was wrong and got it fixed. But the light is still on after i drove it all week . error code po443 The evap purge solenoid

My car has 170000 miles.
My car has an automatic transmission.

Evaporation Vent Solenoid Replacement $112.55 - $402.61 Get a Quote

It sounds like you may have an evaporative emissions system leak. Your car has a small purge valve with a purge solenoid in the Evaporative Emissions system that controls the venting of fumes from the fuel tank as these fumes build up inside, particularly when you are refueling the car with gas. The EVAP system prevents fuel vapors from the fuel tank from escaping into the atmosphere. The EVAP system collects and temporarily stores the fuel vapors in the charcoal canister. The charcoal canister is filled with activated carbon pellets that can absorb the fuel vapors. When the engine is running, the fuel vapors are purged from the canister and burned in the engine. The vent control valve (solenoid) controls the flow of outside air in and out of the charcoal canister. The vent valve is controlled by the engine computer (PCM). Normally the vent valve is open. It closes when the engine computer tests the EVAP system for leaks. If a leak in the EVAP system is detected, the Check Engine light will illuminate on the dash and the trouble code related to the problem will be stored in the engine computer. When an air leak is present in the EVAP system, the MAP sensor will not be able to determine the air density, and the MAF sensor will not be able to determine the volume of air, entering the engine correctly. This will lead to an over fueling situation or an under fueling situation depending on the size of the air leak and engine operating speeds and load. This may eventually lead to catalytic converter problems as well as misfiring problems. I would recommend having an expert from Your Mechanic come to your location to diagnose and inspect your vehicle.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing


Experienced Mechanic?

Earn up to $65/hr

What others are asking

Turns over but won't start, or starts for a few minutes and then dies. It dies while driving also.

Hi there. From the description you have provided, your vehicle's engine dying could be so many things causing the problem. Assuming the Check Engine Light is not coming on. It could be the fuel pump. A fuel pressure test could,...

Brake lights stay on 2000 Chevrolet Silverado 1500

Hi there - I believe your brake light switch is either sticking or mis-adjusted, resulting in the brake lights remaining on after the brakes are used. Turning the ignition switch to the "Off" position removes power to that circuit, and...

Check engine light is on and obdII said O2 sensor. 2002 Chevy Silverado 1500

Hi there - some problem codes require a certain number of "drive cycles" before the ECU will turn off a Check Engine problem code, O2 sensors often being one of them. If your truck is running well, ignore the light...

Pickup coil shield missing on new distributor.

There is more than one manufacturer of distributors or its internal components and will operate the same way but have some small different changes that do not affect the performance of the part. You should not have any problems without...

When replacing my ball joints on my 2005 dodge Strauss do I need to replace the control arms as well

Hi there. When changing out the ball joints, you don't need to change the control arms if you have a replacement ball joint. However, if you are wanting to replace the bushings and the ball joint, then you may get...

Car dies after warming up restarts right after then dies shortly after

The first thing to check for is air leaks. Any air that gets into the engine without passing through the Mass Air Flow meter (MAF) will dilute the fuel mixture and lead to just this kind of behavior. At your...

Car making popping noise when braking.

After seeing the video, you will need to have the lower ball joints and bushings checked to see if one or all need to be replaced. You should also have the exhaust checked to see why the engine is so...

Car turn over but stalls out

Hi. If the engine will turn over and try to start, then it may be a problem with fuel pressure or one of the engine sensors. It is common for the fuel pump to fail as well as the crank...

Transmission slips while driving downhill - 1997 Chevrolet K2500 Suburban

There are many possible technical service bulletins the manufacturer has listed for this problem on your vehicle. The problems range from internal gears to pressure solenoids of the transmission. I suggest having the transmission pressures tested to see if the...

Related articles

A Buyer’s Guide to the 2012 Chevrolet Avalanche
Few Few vehicles are as distinctive as the Chevrolet Avalanche. Part SUV, part truck, the Avalanche is actually surprisingly practical. On the inside, it feels more like a Chevy Tahoe, except when you look out your rearview mirror, you’ll notice...
2012 Chevrolet Malibu vs. 2012 Ford Fusion: Which One Should I Buy?
When you want a midsize sedan, you’re looking for something that will offer you the best fuel economy for the size as well as additional safety features that will keep your family safe while you’re driving across town or around...
The Best Used Cars to Buy for Senior Citizens
Everyone Everyone needs a way to get around. You need to get groceries, get to doctors’ appointments, visit with family and more. However, senior citizens have very different needs when it comes to buying a used car than other demographics....