Must read codes off of the obd-II computer using a scanner for obd-II so that you can know which system is being flagged. This is the first step.
May try to take it to autozone or advance auto parts to have them read the codes for free.
Or, you could purchase your own scanner at Sears or Walmart or your local parts store in order to read the codes yourself, and clear any that are intermittent.
If it's a hard code, as you describe, the scanner will come in handy.
Good luck on this diagnosis.
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is the light on?
Yes the check engine light is on.
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