98-00 GS300 P1755 - How I Fixed it

Link to the ECU that I bought that matched my original ECU:
www.modulemech...
Other Lexus GS300 ECU's for 98-05
www.modulemech...
MAKE SURE THE NUMBERS ON YOUR ORIGINAL ECU MATCH WITH THE ONE YOU BUY!

[@xavierL68]

My 2000 GS300 had the same p1755 code with hard shifting. I got the ECU and the check engine light is off! Drives like a dream again! Thanks bro!

[@santoslopez562]

Did you have to reprogram the old ecu into the replacement one? Or a simple swap will do? Thanks

[@tarrencebrown5553]

How did you fix

[@beiyzzz4851]

@@santoslopez562 did you ever find out if you had to reprogram? Lmk, ty:)

[@beiyzzz4851]

Thank you so much man, I swapped my ECU and the check engine cleared immediately and it ran a lot more smoother, couldn't say thank you enough!

[@stephenjones4013]

Yooooo this video is the truth What THEY DON'T TELL YOU ABOUT LEXUS CARS AND WHY THIS VIDEO IS THE TRUTH.... YOUR LEXUS ECU is actually LINKED to your transmission so if your like me you thinking this video doesn't make sense but that why this video WORKS there is another person on KZbin a LEXUS ECU company that breaks down why changing you computer makes sense....I got ECU from Junkyard and got key to it and like video says. SHIT FIXES EVERYTHING P1755 GONE this video was only life line I had THANK YOU SO FUCKING MUCH!!!!!!!

[@HookerGaming]

Wow i had no idea the ecu was there ive had this car for like 3 years...thanks man!

[@JaredBennz]

Long shot you’ll respond but did you experience any jumping while slow acceleration I got the same code Js wanna make sure it’s the problem

[@oscarvillegas8759]

just got it fixed 🙌👌 thanks 4 the video

[@tarrencebrown5553]

How did you fix it

[@scottleary4969]

this is a great video thanks for posting this. I have a 1998 GS300 with a bad ECU. I know this because the immobilizer keeps locking up and preventing the car from starting. I took it to my local shop and they confirmed it's a bad ECU. So, they want to charge me $1200 for a new ECU not to mention $600 labor for installing another one! No way I am doing this. My question is - if I order my own ECU from module mechanics swap it out, the car won't start with my old keys right? I can actually take the key they send me over to my locksmith and have them cut a new one right? I have a guy who will do it for $10 down the street thanks again

[@ricerintegra2660]

Yea have the new key cut so itll work, or you could take the chip out of the old key and take the chip from inside the new key and put it into the old key

[@joeytupay384]

@@ricerintegra2660 w9

[@gabe22306]

I have a replacement key and it's not a key fob, i've been wanting to get a key fob for my 00' gs300 while fixing p1755, will cutting the key that comes with the Ecu to fit my car be fine?

[@ricerintegra2660]

Yea that'll work

[@DanielSanchezzz771]

how long did the shipping take cause it’s been over a week and i haven’t gotten a tracking number or anything 😓

[@ReneGarcia0]

I Have the code P1755 on my 2000 Lexus GS 300 I swapped 3 solenoids and the check engine light is still there , also I’ve Noticed My 3rd gear Feels like it’s not Working When downshifting From 4th to 3rd or 2nd to 3rd. Do You think If I order a ECU & it’s not the Problem You think they accept Like a refund?

[@scottmoya1148]

Yes it’s your ecu for sure I’m going throw the same stuff as we speak

[@anthonyramirez275]

I have a 2003 Lexus GS300 that won’t turn over nearly replaced everything you think it could be a bad ECU??

[@GGIII96]

im having the same problem i changed everything down to the fuel pump mine turns on runs fine for 5 seconds the dies

[@oscarvillegas8759]

I own a 99 LEXUS GS300 and i too got the p1755 code but only for poor electrical circuit , my car drives everywhere only thing is my rpms are slower and so is my shifting im HOPING its just my ECU ,based off of other gs300 i dont think my solenoids are locking or worn out , i took it to a transmission shop and they tried to tell me that i have 3 codes when i do not i only have the p1755 POOR CIRCUIT I feel like there trying to make me do a whole lot to my car they quoted me without even dropping my pan how is that possible when it could just be the ECU my transmission isn't slipping and they also said my fluids are burnt or contaminated the fluid is still its natural color 🤔💯so idk im not trying to waste money on dropping the transmission pan when there's nothing wrong with the transmission itself only poor power or electric circuit all connectors look good and everything leads to new ECU PLEASE COMMENT WHAT YOU THINK

[@oscarvillegas8759]

@@ChrisBeenRaw thanks man i actually went with the ecu i just received it im going to install it now

[@oscarvillegas8759]

Just got it fixed no mote check engine thanks

[@scottmoya1148]

It is

[@scottmoya1148]

Going through the same thing right now

[@anthonybarksdale3946]

I'm getting the same code. I have a 1999 GS300, but my transmission had a fliud leak due to the gasket failing. I let too much leak out, i felt a couple of hard shifts in 1st gear. After a little driving i turned off the ECT power to normal. 10 minutes later my check engine came on. I went to autozone and the only code is P1755. Since then, i added transmission fluid from Toyota. The car doesn't kick anymore, but the check engine light is still on and my first gear doesn't rev up like yours did in the video to 6000+ rpms. I'm going to try replacing the SLU solenoid and resealing the transmission pan. If that doesn't work, I will then try replacing the ECU. Did you disconnect the battery after replacing the solenoid? Did you ohm out the solenoid to see if it was bad? I have 540,000 miles on my lexus and I have never had a transmission problem. Thanks for posting this video to give me more options to solve this.

[@ricerintegra2660]

I disconnected my battery when I replaced my solenoid, i didnt test the ohms on it because at the time my volt meter was broken, so i used a 12 volt battery to test to see if it clicks or moves and it still works. I'd fix that leak and test the ohms and see if that solenoid is bad before replacing the solenoid. If the pan has never been dropped before, Toyota uses some weird glue like substance on the trans pan. Make sure to clean it all off, I used a gasket that came with a trans filter I bought off ebay. I'd also recommend replacing that filter while you're in there as well. 98-01 GS300's have the A650E transmission so make sure you look up the correct filter for your lexus which should be A650E since yours is a 99

[@anthonybarksdale3946]

@@ricerintegra2660 So to update where I'm currently at on my P1755 code on my 99 GS300 A650E transmission. I have tested out all of my solenoids and they are within spec according to the service manual. SLU is 5.6 ohms ... The problem that i have now, is that i broke 4 out of 6 pigtail connectors from my harness that connect to the actual solenoids because they were so brittle. I'm having a tough time finding the 2-way connectors partly because i dont' know the exact name of them. I'm hoping to find some spare parts at a junk yard or transmission store. Hopfeully i wont have to replace the harness. I ordered a new strainer and gasket that should be here by Thursday. Would you say that my next step would then be to replace the ECU. Does the ECU come programmed straight from the website you have listed or do i need to go to the dealer and have them program it? I'm thinking that it is my ECU since i did notice some other funky stuff going on just before this happened. I don't have second gear just like your video shows.

[@ricerintegra2660]

What I did with my pigtail on my harness which i dont recommend doing but I was impatient, I zip tied the connector together, I'd try looking for another harness out of the junk yard or doing as I did. I'd say the next step would be to replace the ECU, it comes pre programmed from the website, all you gotta do is go somewhere to have the key cut to match your current key

[@anthonybarksdale3946]

@@ricerintegra2660 Just to update. I ordered my ECU from the site you have listed. The ECU should arrive in the next 6 business days. I was sure to match up all the numbers so it should be a perfect match. I also found a small amount of oil when I pulled the right most connector off my ECU. I'll be sure the clean all of that up with alcohol or brake cleaner with a cue-tip before connecting the new ECU. I was able to get the connectors fixed by going to pull a part and taking them off another GS300. I put everything back together and filled it back with the old tranny oil since everything seemed okay with solenoids. I had to add about half a quart of tranny fluid due to me spilling some on the floor. I put in the new strainer and gasket. I'll keep you posted when i get the new ECU. Fingers crossed.

[@anthonybarksdale3946]

My new ECU came yesterday, I unplugged the battery, installed it and cranked the engine using my old key with the new key fob. IT STARTED AND IT WORKED LIKE A CHARM. All my gears work, no check engine and my car will now go to higher rpms like your video. Can't say thank you enough for creating this video to help people with this P1755 issue. I saved a ton of money and I actually changed the setting on my transmission to the higher pressure for smoother shifts. Works great. I also put a new gasket and strainer in there. Thanks for all your help again!!!

[@senseigelatosz7214]

Will this fix the doors not unlocking when you try to unlock it wit the key ??

[@madmarlone]

Haggard garage banner!👀

[@beiyzzz4851]

Hey man I just ordered my new ECU, do I need to program it or is it plug and play?

[@ricerintegra2660]

If you ordered one with matching numbers to your ECU, u won't need to program it, just plug and play, and make sure to take the chip from the new key fob and put it into your current key fob so u don't have to get the new key cut

[@beiyzzz4851]

@@ricerintegra2660 Alright, Thanks man!

[@jermainevalenzuela]

Is there a way to get the ECU numbers without pulling out my old one?

[@wickedfisher6451]

Can you guys please tell me what diagnostic tool you use to get these error codes? I've got a 98 GS300 and having fallen on hard times, it's been somewhat neglected. Little nik-nak shit mostly but I've had to get the key replaced twice & the battery a few times, never knew things needed to be reset. I figured I had a few bad fuses. But, I haven't had any problems, (save a dead battery from dome light left on), and it runs great! It's got less than 130,000 original miles so it's still a baby.

[@DanielSanchezzz771]

it’s a obd2 scanner

[@rcsaechao]

Do you still have this car today ?

[@tregs4]

this isn’t a problem on the gs400 is it?

[@KING_TOPGSlope]

When u installed the ecu u didn’t have to call like a dude that programs the key ?

[@ricerintegra2660]

Nah as long as you get the ecu that matches your old one, just take the chip that is in the new key and put it in your old key, and it'll work just fine

[@scottmoya1148]

Dealing with the dam stuff as we speak o got another transmission put it in and the same dam code pop up that like one in a million so I just got a ecu I think that’s what my problem is

[@15digitlongname]

can someone explain what is going on in the example videos? starting at 3:56 -4:21 ? to me it just looks like its shifting at a lower rpm but how can i tell whats its normal rpm to shift at

[@ricerintegra2660]

That's after fixing the code, shifting as it's supposed to. The videos before that, it was going from 1st gear up to 4k RPM, straight to 3rd gear, skipping 2nd gear

[@rubencapeles9642]

Have the same code and runs like shit to me lol how do u know for sure it's the ecu

[@jdagreat4595]

Was the VSC light on

[@ricerintegra2660]

Check engine light, abs, vsc, and VSC off lights were on

[@lizard3rd822]

what exhaust do you have?

[@ricerintegra2660]

Stock exhaust with back mufflers removed and gutted cats