Question about 1998 Honda Civic

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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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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.

Posted on Jul 31, 2009

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