Honda Car Forum

D4 light flashes and transmission shifts from 1 to 4. I have to stop car and turn engine off to clear, Sometimes I try to restart car and it does not start I have to wait for approx. 10 mins before it starts. (sometimes it does not work). I have recently change transmission fluid and this still happen. It does not matter if the engine is hot or cold. Mileage is 20014. Please help!!!! I am desperate. Is this transmission or electrical problem

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Butch#1

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"Butch#1" <Butch1.1y4a64@no-mx.carstalk.net> wrote in message news:Butch1.1y4a64@no-mx.carstalk.net...

> D4 light flashes and transmission shifts from 1 to 4. I have to stop car
>and turn engine off to clear, Sometimes I try to restart car and it does not
>start I have to wait for approx. 10 mins before it starts. (sometimes it does
>not work). I have recently change transmission fluid and this still happen.
>It does not matter if the engine is hot or cold. Mileage is 20014. Please
>help!!!! I am desperate. Is this transmission or electrical problem?

Believe it or not a bad ignition switch or a bad main relay can cause the
TCU to go crazy. I've tried it, these models are notorious for this. Better
get your main relay fixed or replaced.

"Burt S." <burtsquareman@gmailcom> wrote in message
news:WSHbf.13865$tV6.7669@newssvr27.news.prodigy.n et...
> "Butch#1" <Butch1.1y4a64@no-mx.carstalk.net> wrote in message
> news:Butch1.1y4a64@no-mx.carstalk.net...
>
>> D4 light flashes and transmission shifts from 1 to 4. I have to stop car
>>and turn engine off to clear, Sometimes I try to restart car and it does
>>not
>>start I have to wait for approx. 10 mins before it starts. (sometimes it
>>does
>>not work). I have recently change transmission fluid and this still
>>happen.
>>It does not matter if the engine is hot or cold. Mileage is 20014. Please
>>help!!!! I am desperate. Is this transmission or electrical problem?
>
> Believe it or not a bad ignition switch or a bad main relay can cause the
> TCU to go crazy. I've tried it, these models are notorious for this.
> Better
> get your main relay fixed or replaced.
>
I concur. Happened to mine. Replaced Main relay. All clear now.

You have only 20014 miles on that car? Are you selling it?

Butch#1 wrote:
>
> D4 light flashes and transmission shifts from 1 to 4. I have to stop car and turn engine off to clear, Sometimes I try to restart car and it does not start I have to wait for approx. 10 mins before it starts. (sometimes it does not work). I have recently change transmission fluid and this still happen. It does not matter if the engine is hot or cold. Mileage is 20014. Please help!!!! I am desperate. Is this transmission or electrical problem?
>
> --
> Butch#1
>
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If the car won't start while you're waiting to get your main relay
resoldered, just turn the key to position II. Smack the left side of the
dash with your fist and you'll hear the fuel pump run for three seconds.
Car will now start. Easier than waiting ten minutes for the inside of
the car to cool down.

'Curly'