Why is the engine light on on my Chevy Malibu?

OBDII said it was a bad gas cap so I replaced it with the first aftermarket cap I could find. Engine light never did go off. Started reading on the internet and found out that the gas cap has to be OEM or it will not work. When I compared my new cap to the original cap, which I had not yet discarded, I saw that they were really different.

Why is the gas cap missing from my Check Engine light?

The cap is not in place or securely sited. The cap is completely disappeared or missing from the car. The cap cannot close properly due to grime and mud near the opening. The gas tank is out of shape due to an accident, putting extra pressure on the gas cap.

Why does the Check Engine light come on after replacing the fuel pump?

The check engine light came on after replacing the fuel pump they said it was my gas cap. Turned out they didn’t reconnect some tube when fuel pump was replaced. I was getting gas fumes inside the car on occasiona also. at times the engine light will turn on, only to find out the gas cap is not properly placed, after gassing up.

What does it mean if your gas cap is loose?

This system monitors a number of engine and emissions-related components to ensure that everything is in working order. If your gas cap is not properly attached, you may see a “Check Engine” light or a “Loose Cap” warning light on the dash.

What to do if your gas cap is missing?

Grab the gas-cap handle. Twist it anti-clockwise to open it. Now, if the gas cap is missing altogether, all you need to do is install a new one (coming to that in a bit). But if the cap is there, check closely for crack, tear or chips. If you find any damage, the cap needs to be replaced.

How does the EVAP system work on a Chevy Malibu?

The EVAP system captures all fuel vapor from the fuel tank and sends them to the engines intake in order to be ignited in the normal combustion process. When there is a large leak in the Chevy Malibu’s EVAP system, it will throw the P0455 OBDII Code.

Where is the purge vent on a Chevy Malibu?

Attached to the fuel tank, right side, about the size of a soup can. You’ll need to drop the tank down a bit to get it out. Purge is under the hood and would depend on what engine you have as to exact location. You’ve ruled out the fuel cap already?

Can a fuel leak cause a Chevy Malibu to stop running?

While P0455 is not going to cause the Malibu’s engine to stop running, it should not be treated lightly. You could have a fuel leak. Pay extra attention to your tank level and make sure you are not leaking fuel. We recommend taking it in and/or dealing with it right away.

Can a bad gas cap cause a check engine light?

The gas cap is a part of the vehicle’s evaporative emissions system and can cause problems with the system if it has an issue. An improperly sealing fuel cap may cause an evap system leak, which will set off the Check Engine Light when the the computer detects the leak.

What does the fuel cap warning light mean?

The fuel cap light tells you when a leak has been detected in your car, most likely from a loose gas cap.

What to do when gas cap light does not turn off?

If the light doesn’t turn off, inspect the gas cap for any damage and replace it if necessary. A leak present somewhere else in the system can also trick the computer into thinking the gas cap is leaking. If the gas cap looks okay and the light does not turn off, have a certified technician investigate the issue and determine the cause.

Can a loose gas cap cause your check engine light to go off?

If it does not click in place or is loose after clicking into place the cap needs to be replaced. The check engine light should go off after you drive for several minutes if the light was caused by a loose gas cap.

The fuel cap light tells you when a leak has been detected in your car, most likely from a loose gas cap.

What to do if your check engine light is flashing?

Once you’ve noticed the check engine flashing, don’t worry. If it’s for gas cap failure, the fixing will take a mere few minutes. Turn off the engine vehicle. Open the gas cap door. The door is usually locked, you’ll find a push button to unlock it.