My truck is a 2004 f150 new body style 4x4 5.4 crew. For a while now it has been flashing a 4-2 code a few times right after i start then stays lit. Does any one know what the code is and how to fix it.
Thanks,
Brian

 

Code 4-2 is for the front impact sensor. It is located on the vertical support in ftront of the radiator just below another sensor. The contacts have a tendency to get corroded from the weather. Make sure that the wires are not loose or broken. It is very easy to replace the sensor, just plug and play. When you make the repair just put some dielectric grease on the connector.

 

Thanks for the fast response. I will take a look at it in the morning tomorrow when I have some day light. Thanks again for the response. I will let you know how it worked out.

 

i could be wrong and probably am but check the light bulb on the "passenger air bag off" light that is right above the radio. place about 50lbs on the seat and the light should come on

 

You're right, you are incorrect.

The LFC 42 has nothing to do with that bulb (causes a 27).

Steve