The fuel injectors will not directly turn on the check engine light. There is NO feedback from them to the computer. Now, unless they were allowing too much or too little fuel, that would set a rich or a lean condition that would be stored in the computer. Whenever a check engine light comes on, it sets a trouble code in the computer. Now, if there are no codes present or the codes are conflicting, then I would suspect that the computer is going bad.
Bob, The Auto Answer Man
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