code help please

[smiff]

Ive got a recuring code that i cant figure out its 17544 system lean add
basicly i added some stp fuel cleaner hopeing it would sort out some poor idleing after around 250 miles this code keeps reapering the tickover is a little high and i can't here the carbon canister ticking away when it usually dose any help will be greatly appreciated:cry:

[smiff]

For future referance it turned out to be a split pipe under the manifold all sorted now:D