GX460 P2714 P0761 Ultimate Summary and Hope For A Fix Thread (1 Viewer)

[mudwagon]

Just FYI, you guys might be going down too many rabbit holes. ODB codes are set in 1 of 3 ways. Type A, B or C. Type A is immediate, B is two failures of X key cycles (generally 2 in a row) and C won't set a MIL but lives in the background with no action. Often times OEM's will have 2+ DTC's that set alongside the other. If you get a check engine code and are seeing a Type A code alongside a Type B code it is likely the Type A code that is causing your failure, not the Type B.

For this issue, P2714 is Type A and P0761 is Type B according to my internal sheet which spans across OEM's as CARB/EPA regulates this. I would focus on the P2714 rather than both. If you still have a P0761 after you fix the P2714 then you likely had failures of both. P2714 is likely from a clogged solenoid, you'll want to replace the solenoid, filter and drain/fill. Clear codes and drive normally. If that still doesn't fix it, might be valve body related. But the general consensus is that if solenoid replacements don't work it's probably more economical to do a full rebuild or reman replacement.

As for maintenance on my '13 with 146k I just did a transmission filter replacement about 10k ago and 6 quart drain and fill with another 4 quarts I need to drain and fill soon to get a 50%+ new fluid ratio. I haven't had any issues with that tactic. I have been starting my GX at 0 deg cold starts since I replaced the fluid too, not an issue for me....yet.

 

[riccog125]

Great thread. We just had this issue pop up this morning in our 2013 GX460 with 188k miles. Below freezing Temps today here in the New Orleans area. My daughter was in an accident 3 days ago and we haven't driven the car other than driving it back home from the accident 2 blocks away. She was pulling out of our neighborhood turning right and either drifted to far into a 2nd lane or person in a tacoma was entering her lane without a blinker. Damage was front bumper, drivers fender and some marks on the front drivers wheel. She said it was a pretty good jolt. My wife said it drove fine when she drove back to the house. When she left this morning it shifted hard and CEL and 4LO flashing. She immediately came back home and I put my scanner on it. Once the codes " P2714 P0761 " came up I started to wonder if the accident may have caused this or was it coincidental. I can see the wheel was impacted pretty good. Now I'm trying to figure out how to proceed. Anyone else had these codes pop up after an accident? Do you this it would be possible? Vehicle drove great prior to accident.

 

[GXinTx]

Question: Does the work order below look like a comprehensive overhaul of transmission to address the P2714 / P0761 codes on a 2011 460? I know, tough to say without knowing the diagnostics.

I have a 2017 and I am considering purchasing another one, 2011 w/ 150k miles that has recently had the work below performed in Dec 2023. Current owner is not a car guy and does not know what codes were showing when he was having issues. Work was done at a transmission specialist shop. Sorry for the redactions below, but do not want to draw attention to the people that did the work, just the work that was done.

Truck seemed to have no issues during 30 minutes of mixed highway and neighborhood test drive

 

[r2m]

So you're saying that after all that work, it still shows codes? Or is it okay?
If it's not showing any codes after a half hour drive, I assume both around town, under load (flooring it) and at highway speeds, you should be good.

 

[GXinTx]

So you're saying that after all that work, it still shows codes? Or is it okay?
If it's not showing any codes after a half hour drive, I assume both around town, under load (flooring it) and at highway speeds, you should be good.

Thanks for the reply.

Sorry for any confusion - not showing any codes now. Just wondering if the scope of work appears consistent with what would be expected for a proper transmission overhaul.

 

[Rednexus]

That invoice looks like it was more or less a full transmission rebuild.

I would personally be skeptical of a rig that is being sold when the transmission was rebuilt only a month ago. Given what they probably paid for that rebuild ($4-5K I'm guessing) it seems odd they would then unload the vehicle so shortly thereafter. Did something else go wrong with it or did the rebuild not fix the problem, prompting the decision to just cut their losses and unload the rig?

On the plus side those appear to be very reasonable prices for everything . Nice to see a shop that is not gouging on things like transmission fluid and other misc. pats/components.

 

[Acrad]

I would see see how many miles ago the codes were reset with OBD Link. It can also show you roughly how many separate warm ups or drives vehicle has been on as well.

OBD Fusion/Link - Vehicle Diagnostic Tool - ClubLexus - Lexus Forum Discussion

GX - 2nd Gen (2010-2023) - OBD Fusion/Link - Vehicle Diagnostic Tool - PID Screenshots (https://photos.google.com/share/AF1QipPOIZn6WWqVG3YVNnYwcD3IvfbLHcnWJ8RGn5eWAMMeIVz0B42IqGbS2fuglaMJ0A?key=YTNFUjRxc0NCS3ZVaTRhZm4zdVJCUnVuYWdwdlJR) This app has been been discussed in a couple separate...

www.clublexus.com

 

[mudwagon]

I would see see how many miles ago the codes were reset with OBD Link. It can also show you roughly how many separate warm ups or drives vehicle has been on as well.

OBD Fusion/Link - Vehicle Diagnostic Tool - ClubLexus - Lexus Forum Discussion

GX - 2nd Gen (2010-2023) - OBD Fusion/Link - Vehicle Diagnostic Tool - PID Screenshots (https://photos.google.com/share/AF1QipPOIZn6WWqVG3YVNnYwcD3IvfbLHcnWJ8RGn5eWAMMeIVz0B42IqGbS2fuglaMJ0A?key=YTNFUjRxc0NCS3ZVaTRhZm4zdVJCUnVuYWdwdlJR) This app has been been discussed in a couple separate...

www.clublexus.com

That only works if there was not a hard battery reset. There is a small chance it would still read if the battery was disconnected for a short period. But usually a battery reset also clears codes and those counters once the temporary memory storage clears. Generally speaking it's pretty common practice to disconnect battery terminals during a job on the engine or transmission and to clear codes and counters after.

 

[Acrad]

I would expect a reset to the engine/transmission work but this would help confirm no issues are still occurring post rebuild and owner is resetting codes.

TBH.. this vehicle would be a pass for me as have seen more reports of rebuilds that still had issues. If this was a Lexus/Toyota reman swap I would be open to it though.

 

[mudwagon]

I would expect a reset to the engine/transmission work but this would help confirm no issues are still occurring post rebuild and owner is resetting codes.

TBH.. this vehicle would be a pass for me as have seen more reports of rebuilds that still had issues. If this was a Lexus/Toyota reman swap I would be open to it though.

Correct. Anything post build, for sure you should be able to see how many miles were put on since the build. Really you'd just be looking at the miles since clear data. The rest wouldn't be populated unless the seller cleared and let it sit to sell. I did have a vehicle back in the day, the owner just took the check engine bulb out lol (back before I knew anything about cars).

 

[Acrad]

@GXinTx

Are you able to provide the total on line #1? Wondering what cost or hours of just Remove and Install would have been with a separate transmission

I’m seeing $2,667.04 on the parts for rebuild minus the fluid

A Lexus reman that is reportedly all new except for re-use of the external case is $3375

Lexus OEM Transmission Part# 35010-35B70-84 | OEM Vehicle Parts

OEM Lexus Part # 35010-35B70-84 - Transmission Fits 2010-2023 Lexus GX460 Models: Up To 35% Off On Every Order And Guaranteed Fit When You Enter Your VIN

www.oemvehicleparts.com

 

[Bdog0820]

I am so glad I found this email thread. I have a 2010 Lexus IS 350 (A760E 6 speed transmission) that is experiencing EXACTLY what you all are describing. Randomly trips on cold starts during it's first shift from 3rd to 4th in that drive cycle. Sometimes I go a couple days without the code tripping again, sometimes it'll be an entire MONTH until it trips. This problem started for me at 152,000 miles. I'm now at 180,000 miles with the same issue, it has not gotten worse either. My car does a temporary go into limp mode. As long as I downshift to 2nd (whether by slowing down or hit the shift paddle, it'll shift through all the gears like nothing happened. This is absolutely driving me nuts as I do not believe this truly requires a full rebuild or transmission replacement. Things I have done so far that did not work: Replaced SLT solenoid (for code p2714 solenoid D), multiple drain and fills, cleaned transmission oil filter. Swapped S1 solenoid with S3, it still trips P0761 S3 solenoid. So solenoids are not the issue here.

 

[r2m]

One thing I would really consider odd is that you're in CA, which I may assume means the term "cold" is not like our friends in the mid-west or back east.
Unless of course you're up in the mountains.
When these other folks have issues in the cold, I believe they're referring to around 0° when having issues.

 

[Biginboca]

One thing I would really consider odd is that you're in CA, which I may assume means the term "cold" is not like our friends in the mid-west or back east.
Unless of course you're up in the mountains.
When these other folks have issues in the cold, I believe they're referring to around 0° when having issues.

Not necessarily I’m in Florida and only had the issues on “cold” days (meaning 60 degrees F and less). Maybe that’s “cool” days for you

 

[Biginboca]

What’s crazy is I didn’t have the issue when I went to north Georgia at Christmas where it was 20-40 degrees, but when I was there I was starting the car and letting it idle to get the heat going for about 5 mins before we left to go anywhere. And never had a code that whole week and 900 miles trip. Had codes a day before leaving and the day after getting home (60 degrees weather again)

 

[ericm979]

Did you do the TCU reset after replacing the solenoids?

 

[r2m]

Not necessarily I’m in Florida and only had the issues on “cold” days (meaning 60 degrees F and less). Maybe that’s “cool” days for you

Ha-ha! I was actually referring to Bdog0820 - https://forum.ih8mud.com/members/bdog0820.220376/ since he is actually in CA!
But FL temps are about the same as CA but with way more humidity.

 

[LiamO]

Glad I stumbled on this thread. Was interested in purchasing a 2011 GX460 with 125k on it. Seller is in AZ and I was going to be down there next week and was thinking of purchasing and driving home to Idaho, roughly 1100 miles. 2 owner with all dealer service records. I added the VIN to the Lexus Owners portal and the last known dealer maintenance was in March of 2022 as follows:

REPAIR NUMBER: 0640007
REPORTED BY: Bell Lexus North Scottsdale

SERVICE: *TRANS SERV BASIC
DESCRIPTION: ~|~PERFORM TRANSMISSION SERVICE BASIC ~|~ ~|~SERVICE AUTOMATIC TRANS, MINOR 10/22 NO CHARGE FOR LABOR, PARTS ONLY. SEE JOB 1

SERVICE: TRANSFER ASSEMBLY
DESCRIPTION: ~|~GUEST HAD VEHICLE TOWED IN. UPON ARRIVAL THE DIFFERENTIAL LOCK WAS ON, THE 4 LO LIGHT FLASHING, CHECK ENGINE LIGHT ON, AND TRACTION CONTROL LIGHT ON. ADVISOR PUT VEHICLE INTO NEUTRAL AND HIT THE DIFF LOCK BUTTON. THE DIFF LOCK SUCCESSFULLY TURNED OFF. NOT ~|~FOUND DTC P0761 AND P2714. THESE DIAGNOSTIC TROUBLE CODES ARE RELATED TO THE TRANSMISSION, SPECIFICALLY THE SOLONOIDS. TECH CHECKED TRANS FLUID AND FOUND IT TO BE DIRTY AND BLACK. RECOMMEND STARTING WITH TRANS FLUID SERVICE, BUT IT STILL MAY NEED A TRANSM ~|~PREFORMED TRANMISSION FLUSH, CLEARED CODES AFTER TRANSMISSON FLUSH. TEST DROVE VEHICLE IN CHECK MODE ON HIGHWAY AND SURFACE STREETS. MIL LIGHT CAME BACK ON FOR SAME DTC P0761 AND P2714. VEHICLE NEEDS TRANSMISSION AT THIS TIME. NO FURTHER REPAIRS RECOMMENE

SERVICE: SFI.MFI
DESCRIPTION: ~|~CHECK ENGINE LIGHT ON ~|~ ~|~SEE JOB 1, RELATED TO TRANSMISSION ISSUES


With this in mind, I may pass. I am waiting to hear back from current seller on how or if this was addressed. He does have a high seller rating on marketplace, but I dont want to sell our 2005 4runner which has been phenomenal to us, for a potential expensive headache. Asking price is $17,600.

 

[Bdog0820]

Haha! Yes sorry when I say cold starts I just mean the cars been sitting overnight and the engine isn't warmed up. I'm upin northern california so we get temps down into the low 30's sometimes. Plenty cold for me . Since the issue sporadic it's hard to say if it gets worse in the winter or summer for me.

 

[Rednexus]

I'd do a hard pass on that one unless the seller cuts you enough of a deal that you can afford a new Toyota/Lexus reman transmission that is replaced at the dealer. I'm guessing the all-in cost for that is around $5-6K plus.

Regardless of if the speed sensor corrects the issue, you're still stuck with a trans that had some nasty fluid in it very recently. The damage may have already been done.