Sorry for another trans trouble thread, ive been trying to search for like 2 days but cant really find a definitive answer to solve my problem.

So i start the car, shift into Reverse and goes in perfect, shift into Neutral and goes in perfect, shift into Drive and it hesitates about a second or two and then goes into gear. So i step on the gas, 1st gear revs up fine and then when its normally supposed to shift into 2nd the trans will just keep going in 1st for longer than it should, and then the rpm's will flare up about 500 rpm without any acceleration accompanying it and then it will shift abruptly into 2nd gear. 2nd 3rd and 4th gear all drive fine with plenty of power and shift between them flawlessly. The problem comes back again when coming to a stop, when i come to a stop and the car is supposed to shift into 1st ill be stopped and then 2 seconds later you will feel it go into 1st. definately really delayed.

I scanned my obd2 and got codes P0700, P1751, and 47-01 (which i think may be a honda specific code or something?). I just don't get why i have codes relating to 2-3 when i have no trouble with those gears unless i'm not understanding something. I popped off all 4 solenoids and cleaned the screens on em, not very little debris on them.

probably around 120k miles on the car, did a few trans fluid drain and fill around 10 or 15k miles ago and fluid level is OK. what should my next action be?? THANKS IN ADVANCE GUYS!

 

While you have 3 codes, they are basically same code. P0700 is general AT fault code present when other codes are set. P1751 is "mechanical problem in hydraulic control system for shift solenoid valve B and AT clutch pressure solenoid valves A and B, or problem in hydaulic control system." Code 47 is obd1 code for P1751. Not sure if the -01 has any significance.

Honda shop procedure says replace both shift solenoid and clutch pressure solenoids A/B, and if codes return replace transmission.

good luck

 

hmmm, so i assume either the A or B shift/clutch pressure solenoids controls the shift from 1st to 2nd and from 2nd to 1st? because for some reason when i was searching around i feel like i remember someone saying that the C solenoid controls 1st to 2nd shifts which is kinda what threw me off and partially why i think i am lost. thanks for the response!

and even after researching again i still cant figure out which solenoid is which. from this picture there is A, B, and C solenoids:
https://www.hondaaccordforum.com/for...oids-4-cyl-jpg

but in this parts diagram there is only an A and B, and they don't correspond to the picture above:
http://www.hondapartsnow.com/Page_Pr...igPicture=true

 

Clutch Pressure Control Solenoid A and B and Shift Solenoid B are clearly identified in the diagram. The parts diagram is unclear.

I would try to find used parts as parts replacement is unlikely to be successful. You could also just remove and test the solenoids for electrical function and sealing (light air pressure). They are simple reliable devices and rarely fail. You would have a different code if there were an electrical fault in any of these solenoids, so sealing is really only test. They could also be blocked w/ debris.

good luck

 

yea i just didn't know which picture was the correct one. i did test the double solenoid one (with the TCC and the A shift on it) and it seems like one of them has a weaker "click" when cycling the solenoid compared to the other. i forgot to Ohm it out while i had it off but maybe ill try that too if i can figure out the specs for them in terms of resistance.

 

Clutch Pressure Control Solenoid resistance is "about 5 ohms". Anything between 4 and 6 ohms should be OK.

Shift control solenoid B (and C) have spec of 12-25 ohms.

A delay in shifting can be acceptable if you release throttle at 1-2 shift to allow upshift. Many cars are driven for years w/ this condition.

good luck