Having problems with your 2003 Ford Explorer Sport Trac ?
Evap code po 442 checked all hoses gas cap is ok reset light came back on after a few days.
There are two 02 sensors on yor exhast system. One before the muffler and another after the cat converter. The one one after the cat conv is the one that trips the lamp. The converter is either failing or your emmissions are excessive and the converter can't burn them off. If you feel the cap and vapor recovery is associated with your problem, It is possible if the vapr recovery solenoid is dumping to much into the engine. So, Have the vapor valve chk'd then go for the #2 02 sensor if it doesn't clear the light. Good Luck _Ned_
Repair Help & Product Troubleshooting for 2003 Ford Explorer Sport Trac
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