Question about 2003 Ford F150 Regular Cab

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2003 Ford F-150 service engine light

I have a 2003 F-150 single cab truck. Back @ the beginning of the year it was on I got it tested and it was the O2 sensors, they were replaced. Now the light is back on, I havent taken it to get it tested to get the code yet. My husband thinks it may be the gas where we live because after the O2 sensors were replaced there were reports of water in the gas. Is there a way to make the light turn off long enought to get it inspected and will it pass?

Posted by Jenn816 on

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1 Answer

Brad Brown

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  • Ford Master
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You can go to any autoparts chain store and have them try but if it is not corrected or corrected itself in 3 start cycles, it will come back on.

Posted on Jun 20, 2017

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3 Related Answers

keemo68

Ronald Mueller

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SOURCE: 96 Ford truck engine lIght will not go away.

this is the problem with code readers they bwill tell you the code and sometimes even have a reset feature. However they do not tell you the parameters and don't have an drivability feature so you can not test the ecm and all the sensors or modules while engine is running. diagnostic scan tools are very expensive and hard to use unless you have been trained to do so and PEP BOYs is not what I call real reliable mechanics to begin with. Now I concure with toddG on his reasoning in what might be the potential fault. if your vehicle is running rich or lean your O2 sensor will pick this up on the exaust side, however it is not the sole sensor responsible for the ecm adjusting the fuel air mixture.. you stated that you have switched out several o2 sensors and the fuel pressure regulator, but there is also you mass air flow sensor, your TPS sensor, as well as your map sensor these are worth checking out and just because a faulty sensor is the problem doesn't mean you will get a code each time. the system is built with redundancy in order to keep the vehicle running. in order to get the best possible diagnois take it to a shop where they have a full diagnostic scanner this will have not only OBD1 and OBD2 but cam protocol as well. while the tech is scanning the vehicle he will be able to see how the engine is performing under realtime conditions. please rate this as well as change the rating for toddg because he did offer a valid suggestion

Posted on Oct 02, 2008

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Anonymous

  • 49 Answers

SOURCE: i need the fuse box diagram for my 1985 F-150 XLT single cab 351

Under Instrument Panel, right of parking brake.
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Posted on Feb 11, 2009

Anonymous

  • 24 Answers

SOURCE: Error code P0402 2001 Ford Escape

This might sound crazy but it works with these Escapes most of the time. Go buy a can of Seafoam from your part store. With the engine off, disconnect the brake booster vacuum line and place it in the can of sea foam. Start your engine and keep your foot on the gas pedal and keep the RPM's around 2k.The vehicle is going to smoke like crazy for 10 minutes or so, when the smoke clears up for the most part, go drive it for a couple of miles and see if that helps. It cleans out the carbon buildup from you intake and sensors and takes care of that code you getting most of the time. OR, you purge canister needs to be replaced...

Posted on Jul 16, 2009

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