Dreaded trans woes: 08 Sequoia with P2714 / P0761 with a twist.....

Hi everyone, Long time lurker, new poster.

I've read many posts on similar issues but mine seems to be a little different. Here goes.

My 08 Sequoia has 241k, One morning it would not shift above 3 rd gear, threw P2714 / P0761 codes / and goes into limp mode. After resetting the codes ( either with a scanner or by pulling the negative terminal for about a min) it runs fine until the next morning or it is turned off for a few ( 4-5) hrs . I noticed it only seems to have the issue after it has sat long enough for the SAIS to come on.

I have replaced the valve body with all new solenoids, speed sensors,and did a fluid replacement 2x. everything looked pretty good. fluid was dark , but no chunks and very little shavings in the pan for 241k. When running, the trans shifts smooth all day with no issues, no jerking, grinding etc. It drives and shifts completely normal, even towed with it and it was 100% normal. I'm starting to suspect a bad capacitor or possibly the resistor issue seen in the RAV 4 in the ECM. the harness and connectors look good and were cleaned when the valve body was replaced.

I'm curious if the SAIS could cause this? actuator being stuck loading down the ecu possibly but not throwing a code? Just seems really funny it has the issue, then 1 min later it drives and shifts fine, but only on cold start. Any input is appreciated. Will follow up with anything i find also. Thanks!

 

An AIS malfunction can put the truck into limp mode, throw codes, and keep it from shifting above 3rd.

The AIS only works when the engine is cold...so if it is malfunctioning that's when you would get the codes and limp mode, IWT.

I would either rebuild the AIS or bypass it with a kit...worth a shot at this point!

ToolCat

 

I was going to give the bypass a shot. I just have a hard time wrapping my head around it being a mechanical or pressure failure if i can clear the code 10 seconds after it happens and the truck runs perfectly all day. As well as it only throws the code the first 3-4 shift of the day, after the ASIS has run.

 

I’m having this problem 08 Sequoia with only 140k miles. Any luck with the bypass?

 

I haven't done the bypass yet. Added the shudder stop and it shifts smoother than I have ever felt it, but still has the issue on cold start after a 20 min warm up. Drive 30 sec, clear codes ( even if no codes are present ) and it drives fine. I pulled the ECM nothing looked off in there ( I'm an electronics tech). Checked grounds etc. all good. I'm going to order the bypass soon and see what that does. ECM after that. If it still has it after that, it's getting traded for an Armada or another sequoia.

 

Buddy had an older Armada and claimed it could scorch Earth. Looked ugly as sin though.

 

I saw that you had said you disconnected the terminal for a minute. But I had read on some other message board to try disconnecting the terminal for 30 minutes to erase the tranny's memory/shift learning (whatever it's called). So I did that reset on Sunday afternoon, and it hasnt happened again in the past four mornings. It had been doing it every day prior for the past couple/few weeks. I should mention that a week ago I did a full fluid change, but it was still having the problem until I did the reset Sunday.

 

Also, if SAIS is the secondary air intake sensor, I just had my whole secondary air intake pump and whatever else replaced like two years back for something stupid like $2500-3000, before I heard about the bypass. So I wouldn't think that is causing the problem, in my case anyways.

 

Nevermind, it started doing it again.

 

Any luck? I ‘m experiencing the exact problem that you are describing and it’s driving me nuts because my Sequoia drives and tows perfect after clearing code. Any help would be awesome…

 

A quick search for those codes pulls up transmission solenoids C & D as the culprits. P2714 pertains to D and P0761 to C. It appears they are responsible for maintaining proper fluid pressure to ensure smooth shifting. Did y'all look into those yet?

 

Yes, I put in a tube of Shudder Fixx and after about 100 miles it stopped doing it completely. I added a second tube for good measure. It’s been 2,000+ miles with zero issues. I read more about it and it likely has to do with an internal valve in the solenoid(s) starting to stick just slightly, and the Shudder Fixx super lubes it up. I never had any shudder, but it works so far.

 

This guy does a great job of diagnosing a shift solenoid and subsequent replacement.

This video shows the location of the solenoids at 4:25.

 

Yeah I don’t quite trust myself enough to mess with the internals of the tranny.

 

Looks pretty straightforward.

 

Did you give shudder Fixx a shot?

 

Still issue free? Having the same issue on a tundra.

 

Issue free for 8,000 miles so far.

 

I read up a bit more on it also and have come to the same conclusion that you have. Mine only had a issue dead cold in the morning so maybe new fluid has helped it out. So far so good even though I haven't got the permanent p2714 to clear on its own its been shifting great even on cold mornings. Even so I added a tube of shudder fix today anyway . If shifting changes again I'll look into changing that part on the valve body or just get another valve body all together.

https://www.sonnax.com/tech_resourc...aults-in-a761-ab60-a960-6-speed-transmissions

https://youtube.com/shorts/667eSfhZcCo?feature=shared

https://youtube.com/shorts/gVBkfxMCuJY?feature=shared

 

It always shocks me how complex the valve body is. Seems like it would break more often.

 

I'm at 279,500. My truck drives great. Got the light a couple weeks ago when temps dropped, so I had codes checked when I got my oil changed Saturday. Same ones as OP. Haven't had time to book appt at a transmission place.... so was curious if I'm okay to drive out of town tonight for the weekend with this.

 

Should be fine, I drove it home from San Diego to Palmdale, CA with it popping up every now and then P2714, P0894. Drove it daily until Saturday when I replaced the solenoid, been good so far, only been about 100 miles 2nd gear bounce is gone...