SOURCE: Cleaning the Mass Air Flow Sensor
i will try to help. 171/174 indicates lean condition in engine. the mass air flow sensor is located in the rubber tube going to throttlebody. you can try to clean it. using mild carb cleaner safe for sensors, remove sensor from tube. spray clean the tiny wires located in the cylinder. do not touch them, they are very delicate. these engines are also notorious for leaking intake gaskets and faulty pcv valves. these will all set these 2 codes. feel free with anymore questions.
SOURCE: 2004 ford freestar drivebelt
All you need is a 13mm boxed end wrench. The tensioner pulley is the one all the way on the bottom towards the rear of the van. You can reach it under the van. Slide under the van in front of the passenger front tire and you will wee the pulley. Put the wrench on the bolt and pull towards you to release the tension on the belt.
SOURCE: ford freestar 2004 the TRAC OFF message comes
I had the same problem and apparently fixed it by mistake. I replaced the cruise control deactivation switch under the master cylinder, hoping the cruise would be fixed. Some how with that the "trac off" light went out and gave me the ability to turn it on/off from the button again. The part was $30 from the local dealer and easy to replace. Before you run out to replace the switch check the connections on the old one. It plugs in upside down which may accumulate water from puddles and things causing connection issues ( a known problem ).
SOURCE: 2004 ford freestar rear hatch latch broken
have you fixed yours yet? mine started doing this last year
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