Question about 1996 Nissan Altima

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2005 Ford Focus - Mistery Check Engine Light!

Hi,
I have a Ford Focus ZX4 SE (5 speed) and it has a MISTERY check engine light. I took it to the mechanic and the computer did not give out a code. The light comes on and stays on for a few days, then it dims to off for a few days also, then comes back on. When the light is on, it stays on even after I turn off the vehicle.

What do you think is wrong?

Thanks in advance for your help.

Best regards,

Luis

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  • Master
  • 5,158 Answers

Check the relays and see if there is one specific to the check engine circuit.... it's sticking on sometimes

Robert

Posted on Feb 24, 2009

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