1998 Honda Civic Logo
Posted on Jul 30, 2009
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My D4 light is blinking. I just put in a new transmission and engine, car seems to run fine. But why is my D4 light blinking?

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Curt Downs

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  • Honda Master 1,779 Answers
  • Posted on Jul 31, 2009
Curt Downs
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The blinking D4 light indicates a transmission problem. If someone installed the trans and engine for you, bring it back to them to determine what the problem is, as it should be under some type of warranty hopefully. If you did the swap yourself, I would scan for codes (free service at parts stores) to see if any come up. Last, you could try disconnecting the neg. battery cable for about 10 minutes, reconnect, which should reset the computer and the light should go off. If it comes back on, there is some kind of problem still.

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My transmission slips sometime but when cut it off an started back up it work fine an my d4 light blink sometime what's my problem

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