P0440

Just got my engine light on. Went to Autozone and they told me P0440 error.:banghead: Was reading some info, and i checked my cap... what else should i check... :confused:
03 impala

The cap vent may have internally failed, so a visual inspection won't tell you much. You need to check all vacuum lines related to the evap system and the hard lines running to and from the tank, canister and engine compartment. If changing the cap doens't help, and there are no easily seen problems with the lines, a garage smoke machine will pinpoint the leak for you.

how those vacume linnes look like, and do u know any web sites where i can check the pictures, or i should go to autozone and by some chevy impala literature?