I have a code that i need to get the right part..PO174

2000 cadillac deville ch engine light on code po174

Po 174 is typically accompanied by code po 171 however the code is normally a vaccum leak fords normally have an issue with the pcv valve hose collapsing a busting or either the plastic intakes have a vaccum leak that clears up when the engine warms up which is normally the upper plenum gaskets