Mil light on for few seconds

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by kutuzov, Jun 19, 2017.

  1. kutuzov

    kutuzov Light Load Member

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    Apr 13, 2014
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    I did some repairs on my truck, fixed 2 fault codes and other staff. My question is simple when I turn the ignition on the amber solid light comes on and stays on for a few seconds, then goes off. My guess is that is telling me it got stored faults in memory. I don't have a computer so I can't clear old codes, they went away after the fix but I got curios.
     
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  3. Heavyd

    Heavyd Road Train Member

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    Feb 4, 2009
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    Normal. Every truck has an automatic self test function at key on. The MIL light is suppose to come on for a few seconds as a bulb and system test and then go out if no problems are detected.
     
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