Question about 2004 Ford Focus

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My chsck engine light does not go out. I remains on all the time.

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  • Ford Master
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You have a problem with the fuel management or emissions ! an the light being on is telling you that , an more then likely there is a DTC - diagnostic trouble code stored in the PCM , engine computer !

Posted on Mar 28, 2015

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  • Ford Master
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Hey mike this is because the computer has set a trouble code for the emissions you can go to auto zone and ask them to scan the vehicle for you they do this for free with the hope that you will purchase the parts from them for the repairs to be made but it's not a problem if you don't so go to one or advance auto and find out what's wrong then fix it as fast as you can because your computer is in what's called open loop this is a alternate program installed on the computer to keep the vehicle running to get it to the dealer/repair shop and this is not the optimum running program & you will use a lot of fuel and possibly damage other components in the process if you keep operating in open loop O.K. so don't listen to other people who tell you that they run there car like that all the time you'll be sorry later just fix it asap!

Posted on Mar 28, 2015

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Posted on Jan 02, 2017

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