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Old 12-03-2002, 04:43 PM
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Join Date: Aug 2001
Location: seattle, Washington
Posts: 49
1990 300te fault code

Please Help,
My check engine like came on. I checked the codes and got the light to flash 18 times. I then reset it, drove the car around and the light has not come back on. What code was it? should I be worried? Will it come back on at random times? What should I do to fix the problem? Thanks in advance,

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Old 12-03-2002, 05:30 PM
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Join Date: Aug 1999
Location: Cincinnati, Ohio
Posts: 1,935
Idle air valve?

As far as I remember. It's been quite a while..
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Old 12-03-2002, 05:31 PM
Join Date: Mar 1999
Location: Tucker, Ga USA
Posts: 12,153
Code 18 is related to current flow from the CIS-E computer to the idle valve.
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Old 12-03-2002, 05:47 PM
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Join Date: Aug 2001
Location: seattle, Washington
Posts: 49
Thank you for the replies, what would cause this code? and what should I do about it? Is it something that has to be done at a shop, or is it feasable to take care of it at home? Thanks

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