The check engine light will go on and stay on. The cap will either not release pressure or will not release vacuum causing the fuel system to explode or implode at it's weakest point. Or it will leak fuel vapors into the atmos.
gas cap seal bad , replace gas cap !!
The gas cap can prevent vandals from siphoning out (stealing) your gas if you have the type with a lock.
No, it is not a bad or loose gas cap. It is a problem with the secondary air pump.
No
You open the gas cap and this will depressurize the gas lines.
gas cap loose..
what kind of car
Sometimes when the gas cap goes bad it will cause pressure in the tank,also you need a little bit of pressure in the tank,or the car wont run correctly,like if you leave the gas cap off after filling up with gas.
Unlocking the car doors normally unlocks the cover for the gas cap.
Check your gas cap to see if it is on right. I had that once and it was my gas cap not being on right.
open the gas door on side of car and then twist the (nozzle- cap) and put the gas despencer in it and start pumping
You have to remove the gas cap first.