Ya, I agree w/the $$. My light is on also.

 

I replaced the Differential Presure Sensor with a unit from Auto Zone, and reset the light. I have been driving the vehicle for a couple of days since, and the light has not reappeared.

 

Thank you,

 

Autozone scanned mine and the lady gave me a printout of possibilities. I lost it now, but she said to check all the hoses for cracking. That will cause the light and is cheap. On some f150 site i found detailed instructions for the cleaning of all the ports leading to the air intake including behind the throttle body. Remove the intake and unbolt the throttle body and CC cable needs to be unhooked as well. when I opened the throttle there were huge ***** of carbon that led to a port either on egr valve or dpfe. I took all the surrounding parts off and cleaed them off. IAC, DPFE, and EGR. I used a can of carb cleaner, and air pistol from walmart, and a toothbrush. It took me about an hour and a half to clean all the crap out of there. I also needed 3 gaskets from FORD because i didnt want to screw with the old ones. the gaskets were about $13 total, and the other things kept the total for the project under $20. It fixed my problem I really reccomend trying this out. you should have seen all the crap I pulled out of it. The MPG went up by 1.5 mpg immediately, and the project paid for itself in about 2 tanks of gas. I wished I hadnt waited till it needed inspection, I would have saved alot on gas all year.