01 voyager check engine light

I have a check engine light do not know number. It was checked at autozone and they told me a small leak in emission system set the code and light. I replaced the gas cap as a try any other guesses

I have a check engine light do not know number. It was checked at autozone and they told me a small leak in emission system set the code and light. I replaced the gas cap as a try any other guesses
Did you have them turn the light off after you installed the cap ? If not then it will take 50 on/off cycles before the computer considers it fixed and will shutoff the light by itself adn clear the code.

I cleared the codes and the light was off for a while and then it came back on

check the vacuum hose near the right front of the vehicle if it is a 3.3 0r 3.8 liter the purge solenoid hose always seems to crack.