I have a 2000 Honda Accord, and recently it got all jumpy, the check engine light went on and the D4 light started blinking. OBD reports the following codes:
P0700
P0780
P0730

And I can't diagnose the blinking rate of the D4 light, but I uploaded a video of it:

<a href="http://www.mganin.com/DSCN0707.AVI">Video</a>

Any ideas?

 

P0700 is general transmission fault and doesn't have any particular meaning that I've been able to find. I think it's set any time any of the trans codes are set.

P0730 is possible faulty shift control system or hydraulic system fault. You will need a shop manual to know whether this is repairable w/o removing trans.

It may be worth performing a trans fluid drain and replacement. In some cases I've read about from others, this has made a difference.

I did not find a detailed explanation of P0780 in my manuals. It appears to be related to P0730 (hydraulic fault).

Bottom line is you may be looking at a new, rebuilt, or used trans replacement. Start saving.

good luck

 

Damn

Anything I can do to further diagnose this?

 

Well....considering the automatic transmissions in the 98-02 Accords are notorious for going out, I don't really know of anything you could do. If I were you, I would try to put a band aid on it and sell or trade it in. You could try a drain and refill of the fluid, but in some cases I think that could possibly make it worse. I'm pretty sure it made it worse on falkore24's V6 (he wound up trading it in and bought a Scion TC)

 

Won't the trade-in value be ruined? Is there anyway I can estimate its trade-in value?

 

W/ hard shifts and CEL set, the trade-in value will be depressed significantly. I would guess to $1000-1500, maybe less if you consider sellers usually try to hold the sell price up if you plan a trade-in. Direct sale-by-owner will be best, but it may take a while to find a buyer w/ a bad trans.

You can buy a used trans w/ garuntee for $650 (check car-part.com), and labor for installation will probably run about same. So repair could be accomplished for perhaps $1500. This would allow re-sale for perhaps $3000-4000, or you could keep and drive. Perhps a modest advantage to repair, but you take some risk of failed repair or other problems. If car is in premium condition, it might be worth repairing and keeping. A used trans could suffer same fate, or last another 100K.

Jasper or Honda will probably offer a transmission replacement w/ an extended warranty but cost will probably be $3K-4K. That's more than most would invest unless they dearly love the car.

good luck

 

Honda's official policy on code 780 is don't bother replacing the solenoid in question if vehicle has more than 20K. Past 20K codes 730 and 780 are trans codes of death.

In terms of trans replacement difficulty the 98 series accords are a honda mechanics dream car. One of the easiest honda trans r&r jobs.

 

ROFLMAO.......Youngster never pulled an 86-89 trans.

And hey how about that warranty flate rate pay on R&R that 98 trans?
It's one of the things that made me leave dealership work.

"American Honda is increasing the
warranty on the transmission and the torque converter
to 93 months (7 years and 9 months) or 109,000 miles,
whichever occurs first."

Thankfully they are all out from under warranty; but a lot of dealers still do a 50/50 and the Tech gets slammed with warranty pay

 

"a lot of dealers still do a 50/50 and the Tech gets slammed with warranty pay " <-- How can I find out if my dealer does that? If my dealer won't do it, what's the cheapest option I can take? I'm in grad school so money's tight