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D4 Light on and off randomly

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    #1

    D4 Light on and off randomly

    Just wondering if it might be anything else that could cause it besides the tcu? It is only giving me 1st and 3rd when it does do it. Just courious if anyone else has had the problem and it was something besides the tcu. Thanks for any info.
    Tags: None
    #2
    When the light comes on, that's the TCU telling you that something is wrong. Read the "sticky" thread at the top of this section to learn how to read and interpret the TCU error codes.






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      #3
      I forgot to add that I am getting a code, its code 2 which is solenoid B which blinks after about 5 min of driving when it does work but it has done that for about 3 years when I got the transmission "rebuilt". I have tried changing solenoids but it did not fix the code. I am just wondering if its most likely the tcu or could it be something else?

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        #4
        If you've changed the solenoids, and you're sure all your wiring is good, then the next thing to suspect would be the TCU, yes.






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