2001 Honda CR-V Q&A
2001 Honda CR-V Question: What does gas cap have to do with fuel tank pressure?
I was recently told that I needed a new gas cap; all I got in explanation was that it had something to do with the pressure in my gas tank. I had taken the car (2001 Honda CRV) in for the required annual inspection sticker. What are the consequences if I don't get a new gas cap? - AuntieC
Its part of the evap system. It will most likely turn on the check engine light when cars computer checks the system. Its a sealed system with a purge valve if the cap seal is worn or the cap is not on tight enought it will triger the light. if the lights not on wait till it comes on. - pacos grease garage
gas cap seals like any other cap, the evap sys on your car at times builds pressure in fuel sys to ck for leaks and must hold pressure for a period of time to pass test. if any seal is bad light will come on and trip a code.hope this helps - globalhelper