Question

2003 Ford Expedition 5.4L with engine code P0442, what is the problem?

Answer 1

Hi there,

The code is for a small evap leak. There isn't any specific part that you replace with this code. The leak must be found. To do this, a smoke machine is required. You can have a shop do a smoke test and then perform the repair on your own to save some money. Check the fuel cap to start with first though.

Answer 2

P0442 FORD - Evaporative Emission System Leak Detected Small Leak
Read more: https://www.autocodes.com/p0442_ford.html