Darn P0442 Code

[03Explo20]

2003 XLT V6, the 0442 emissions code showed up yesterday. I cleared the code and tightened the gas cap and check the vacuum lines so I'll see if the code returns. Anyone have an idea of what the most common cause for this error is on the 02-05 Explos?

 

[Fix4Dirt]

2003 XLT V6, the 0442 emissions code showed up yesterday. I cleared the code and tightened the gas cap and check the vacuum lines so I'll see if the code returns. Anyone have an idea of what the most common cause for this error is on the 02-05 Explos?

if not the cap or lines id suspect charcoal canister or the vent valve

 

[drdoom]

Rusted out filler neck can cause this too.