P0740 Honda Acura Linear Solenoid Replacement Fix | Accord Odyssey Pilot Ridgeline

P0740 is one of the most common transmission trouble codes. It means that the Accord‘s computer has detected that there is an issue with the torque converter clutch (TCC) solenoid circuit.
The TCC “locks” the drivetrain, which allows for a true mechanical connection between the transmission and the engine. In effect, this allows an automatic transmission to function like a manual transmission at certain speeds and engine loads, and eliminates all slipping from the transmission.
P0740 Symptoms: Honda Accord
The symptoms of P0740 vary greatly. If the converter stays unlocked, it can be a nuisance. If it locks when it shouldn’t be, that’s where it can get dicey.
The most common symptoms include:
Poor Gas Mileage- If the converter is not locking at speed, the engine’s RPM’s will stay higher. This decreases fuel mileage.
Stutters and Stalls- This would be a symptom of the transmission locking when it should not be. It feels exactly like when you need to downshift in a manual transmission.
Higher RPM on highway- If the converter is not locking, it can lead to higher RPM on the highway. This increases fuel mileage and makes the transmission operate at a higher temperature.
Service Engine Soon Light
Transmission Fluid
If there isn’t enough transmission fluid, the transmission will not be able to operate normally. There are many symptoms of low transmission fluid. The most noticeable one is going to be the transmission slipping.
If the transmission fluid is dirty or burnt, it can make the transmission behave in a way that is not normal and throw the P0740 code. Here’s a pretty good guide on transmission fluid color.
If the fluid is low or bad, replacing should be considered an urgent priority. The good news is that transmission fluid and filters are cheap.
Wiring Issues
The wiring harness that goes to and from the transmission is one of the more vulnerable pieces of wiring on a vehicle. Inspecting the harness for obvious signs of distress, checking the connection at the transmission itself, and finally a continuity test can go a long way in diagnosing your Accord.
TCC Solenoid
It is highly likely that the torque converter clutch solenoid (TCC) has gone bad. But, jumping straight to this conclusion without inspecting the transmission fluid and wiring can cause a lot of undue headache.
Torque Converter
The torque converter itself or torque converter clutch can go bad and throw the P0740 code.
Problem in the Case
If the TCC seems to be functioning properly, it may be that the problem is in the transmission case itself. It could be a valve body issue, a problem with the pressure going through the transmission, or a clogged filter.
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[@arthurfricchione8119]

Thanks for the info. Did you use an OEM PART? We're there any drivability issues or just the MIL light and code? Thanks for sharing 😄

[@bundysgarage]

It was a used OE solenoid I got from a Honda specific junkyard. There were no drivability issues. Just the code and that stopped the smog which in turn held up the registration sticker.

[@michaell3711]

@@bundysgarage ,,, Did you say you solved the blinking D light with regrounding the wire ? Explain please as i have a blinking D4 light but my tranny does change beautifully.

[@brianbfree2328]

Thank you for sharing. I recently purchased a 99 Acura 3.2TL and it has this code (P0740) and occaisionally the TCS light comes on. In addition, the shift between 1st and 2nd, and 2nd to 3rd are delayed. The vehicle will also jerk into those gears and rev up before doing so if you don't let up off the accelerator. After it's up to speed the vehicle shifts fine. I've seen videos talk about the Torque Converter Clutch solenoid being the culprit. I also have the Acura shop manual that instructs the tech to check/replace the A/T pressure clutch and Torque Converter Clutch solenoids. I called Acura parts to request the parts and they couldn't find them by name. Is there another name for those two solenoids? Lastly, did the solenoid switch work on the van?

[@bundysgarage]

So sorry for the delay. Yes I ran my own ground from the transmission to the chassis and that solved my blinking light. Honda has bad grounds especially during those years.

[@karlmadsen3179]

I got this code, and I think a P0730(?). My trans in my 1999TL (about 290K miles) wouldn't shift and essentially became a screaming first-gear driver. My local trans experts said I would need a new trans and the two codes together meant it was totally shot. They didn't try to sell me a trans. They told me the work would be too expensive and maybe it was time to retire the car to the big car shredder in the sky. Saddened, I sold the car for scrap metal and bought a Tacoma. Don't get me wrong, I LOVE the Tacoma, but I really wanted to fix my TL. I put 275K of the 290K miles on that beast. Body and interior were still looking great! Maybe with this information I would have given it a shot and would have seen if an inexpensive fix was attainable. After doing my own timing belt change about a year earlier, this looked absolutely easy-peasy.

[@bundysgarage]

Thats a bummer. That was a great car. I know a lot of people talk smack about it but it was a good car. Weak point being the transmission. Engine was rock solid. P0730 is incorrect gear ratio. Fixing P0740 might have cleared P0730 but it’s hard to say. But worth a shot instead of scrapping the car. If you did the timing belt (I have videos how to do that as well) you could have changed the solenoid, no problem!

[@tymeout2u]

Pulled linear solenoid and one of the small pipes is jammed in pretty good. Anything ideas how to get it loose? Machine shop or transmission shop as last resort?

[@bundysgarage]

Get a pair of meddle nose pliers and pull it out

[@j999j9999]

Part numbers A/B solenoid 28400 - P6H - 013 28500 -P6H - 013 For the transmission dual linear solenoid, part number 28250-P6H-024 Hope it helps!

[@SiteReader]

You're working on the linear solenoid, but your text is talking about the torque converter clutch (lock up) solenoid. They are two different parts, at least on my 02 Accord.

[@rudymunoz901]

I use 1 q of max life for every 4 q of Honda Transmission fluid. It fixed the same problem I was having. Low MPG's and long shifting from gear to gear. Plus changed both solenoids too. The clutch solenoid was the main problem.(that's the one closest to the engine)

[@bundysgarage]

Why not just use full MaxLife? I use max life 100% over the Honda ATF. Always seems smoother and better shifting.

[@rudymunoz901]

@@bundysgarage if I use only max life i noticed I get to much clutch material on the drain plug. With a mix a get less clutch material and a very smooth shifting.

[@bundysgarage]

I’ve never noticed more clutch material with Max but understandable if you do.

[@officialyungtwizted3858]

Man.. I just got the lock up clutch solenoid next to the engine and now it's acting up again like wtf? I got it brand new straight from Autozone. Brand new out the box. How's this happening now. Make no sense man.

[@marioalvarado3082]

2001 Acura p1768 solenoid Linear A clutch pressure control valve A failure, D5 blinked while in park waited then drove of in Manual ran like a champ rode in automatic for a bit but I was hesitant , transmission was rebuild during Covid, shop is no longer there sucks so this is my next step hole this works

[@stevenfredell1115]

Where is the article link?

[@lvillage29]

Thank you somuch again I already fix my car you help me alot with you're videos.be safe & got bless you

[@juanvargas4750]

Did you fix your car with the solenoids too?

[@lvillage29]

Thank you for sharing ur experience.it help me alot with this code I could took care mi oddysey the selenoi it was a little durty 1 of the filter. Be safe

[@MrQor2]

Hey GREAT VIDEO.... just wondering if you kindly could show how to UNCLIP those.PLASTIC HEAD ELECTRIC TERMINALS WITHOUT BREAKING THEIR RESPECTIVE BUILT IN CLIPS....

[@MillionaireValetcom]

Thanks for the video! Got the P0740 code on my 2000 Accord V6. Did this get ride of the code? I will be looking for the solenoid at a junkyard, as they are 200+ on Rockauto! Thanks!

[@MrBillybathgate5]

just passed smog today ... drained the fluid twice (also drained the radiator)... that sensor was ticking while i was driving ... i unplugged that sensor and all the transmission sensors that i could reach and then plugged them back up ... unhooked the battery and then hooked the battery back up ... ... not sure why i got that code ... maybe dirty fluid ... maybe connection the sensor ... the ticking when away which i think was coming from that sensor

[@jca8586]

So my odyssey is a 99 but I’m getting a tcs/ check engine light p0135 code plus I did change that solenoid/ and the other 3 on the trans but never touched the little filters on those, I’m also getting high revs in second and 3rd..then goes back to normal…I’m at a lost with these issues…it’s been parked over a month due to this issue and the mileage is 99,999

[@auburndruid1778]

Howdy bro well done. I have a similar problem with the D4 light flashing on my 1998 Honda Odyssey v6, 5 door. The speedo is now at 0 doesn't even move. At first it just jumped around for a while but now it dead. Tried replacing the speed sensor, nope, still nothing. I don't have any trouble driving shifting all seems ok. So what your showing me here in this video is what u recommend me doing or what? Kind regards Auburn

[@bundysgarage]

Sounds like an electrical issue. Try grounding the transmission to the frame.

[@auburndruid1778]

@@bundysgarage Ok will do, can that be any gauge wire, Im going to try a 12awg/4mm ground house wire and see!?

[@auburndruid1778]

@@bundysgarage Ok I but the ground wire in from trany to main frame. BTW the battery already has a second ground to the body as well. Went for a drive and no change in flashing light or speedometer movement!? Wondering if speed sensor is getting power to it? Is there a way to check it? Regards:)

[@johndelacruz1167]

Great job explanation...👌

[@Salzouby]

my filter pipes are stuck and can't remove without applying damaging force. any idea why? putting back is as hard

[@junebug545]

How do you fix the d4 light blinking

[@getboogie1950]

Does this apply to a 2004 Honda Accord LX 2.4 ?

[@srajeweler1]

Did it fix your problem?

[@bundysgarage]

Yes

[@franklinwills4970]

What is the torque spec? I tried looking on Google and found nothing, my Haynes manual seems to have nothing of the torque value.

[@officialyungtwizted3858]

That's the clutch solenoid circuit. Which is the other sensor. With the 2 small domes. Lock up solenoid. This isn't the p0740 code. I've done research.

[@J1wil23]

I have d4 light blinking and stuck in 2nd gear. I have change every solenoid there is. Could it be the ground? I've noticed that you said that you have yours grounded. And I've changed the fluid 3x

[@bundysgarage]

Yes it could be as simple as a bad ground. Honda never did have the best grounds.

[@J1wil23]

@@bundysgarage will it make the transmission go into limp mode

[@bundysgarage]

A bad ground can make components do all kinds of crazy things.

[@J1wil23]

@@bundysgaragethanks for the video and the advice

[@Floridascooterboys]

I have that code on mine do i check if still good or replace with a new one?? Codes i got is the p0740 ,p0730 gear ratio incorrect

[@Ryanh6661]

Ever fix this issue? I have the same codes for my 05 civic

[@Floridascooterboys]

@@Ryanh6661 yes it was the solenoid sensor bad

[@EseGavino7]

What’s the name of the solenoid I can’t find the part this is the exact two codes I have on mine

[@justinsaneok]

@@EseGavino7ever find out mine has the same codes

[@EseGavino7]

@@justinsaneok I ended up needing a new transmission

[@cryeredd7563]

does no one change this gaskets? i skimmed thru 5 videos and no one changes these out, lol. just wanna see if it will be stuck and need to be scraped off-- because i would leave it too then lol

[@andy-pd4eh]

+1 for Maxlife...

[@willpage79]

Do u kno the code p0741 in a honda v6?

[@khy7672]

I replaced on 99 TL shift even worse now does it have to be programmed?

[@bundysgarage]

A brand new part?

[@khy7672]

@@bundysgarage yes had to reinstall the old one back I believe the new cheap one just didn’t respond well 🤷🏽‍♂️

[@pooddescrewch8718]

How much torque to tighten it down ?

[@bundysgarage]

Just snug them up