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    I need help with code 538.

    hey if any one can help me hear. this is my problem. I have a 1994 ford ranger automatic 4.0LT and I just put in a 1991 engine in to it. We tried doing the KOER & KOEO test and code 10--SNAO THROTTLE and code 538-- comes up. And code 111. What is it all mean and how would I fix in??? Pleas...
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