2025 Tundra Hybrid disable start/stop

This truck turns off a dozen times just going to the store. There is no way that can be good long term. Since it';s a hybrid there is no button to disable it. Anyone have a solution to this?

 

Trade it in for a non-hybrid.

 

Can't afford to trade a truck with 2000 miles on it.

 

It is perfectly fine and normal. The actual starter doesn’t start the truck hardly ever (only after you fill up at the gas station). The HV electric motor that’s sandwiched between the engine and transmission starts up the engine mostly.

 

It's almost a seamless action. I'm concerned about wear from no oil pressure constantly. Haven't been through a winter yet so will see how that affects warmup etc.

 

Our trucks do have an electric oil pump. If you watch this video he talks in detail about the powertrain.

https://m.youtube.com/watch?v=bkXiYiGWZnE

 

Weird, never had this probem or notice any shutting off. Maybe you push the brakes too hard ?? In park, I'll hear engine shut off, which is a plus not a negative as don't need whole engine running to enjoy the radio.

 

You want your hybrid to not be a hybrid?

 

Start/stop is great on the hybrid. Tf?

 

Can confirm it’s all good in the winter. It doesn’t turn off really below a certain temp

 

there is no traditional starter on bof hybrid currently so i dont know why the concern (and that is why there is no button to turn it off on a hybrid) unlike the non HV models which have one)

since the hybrid motor is sandwiched between the engine and transmission, it solves the problem of having a conventional starter.

on the hybrid there is sorta like a clutch pack that either

engages the engine directly to the hybrid motor which then engages the transmission

or

the clutch pack disengages the motor (and turns it off) from the hybrid pack and runs the transmission directly

to the start the engine the clutch pack engages with the hybrid motor and it fires up

this is just in a nutshell how it operates

 

It's an interesting question but I'm pretty confident that Toyota's got the engineering down pat in their hybrids. The oil pressure gauge does drop to 0 when the engine turns off while driving (at least it displays 0), I'm not sure if it actually is dropping to 0 but I would imagine it is working as intended.

 

I mean, the ICE literally turns off

 

Yes I know - OP said they were concerned that oil pressure dropped (i have no idea what the concern is) and somebody said there is an electric oil pump. I was just saying that the oil pressure does drop to 0 even when the engine is off and the electric pump is not maintaining pressure. I have no idea why you'd be concerned about it

 

Toyota has this system down, they've used it on many platforms with no issues for almost 30 years. It's not the same system as the non hybrid start/stop feature. It's a non-issue
I'd be much more concerned about getting a 500 and 1000 mile break in oil change done

 

So frequent starts with zero oil pressure on an ICE is a non-issue? How does Toyota's system deal with it, if at all?

 

I just read on another forum:

This concept (though not necessarily disabled cylinders) would make sense - that the electric motor cycles the engine very briefly to rebuild pressure and lubricate components.

 

Yes, non-issue! I can't tell you how they deal with it, I can tell you they've been building them for almost 30 years and they've remained one of the most reliable manufacturers, at least until recent events.
As others stated, I'm not sure that the oil pressure goes to 0psi, the gauge may just be indicating the ICE is no longer running.
It seems most likely that there's a check valve or something in place to maintain oil pressure.

 

Huh. Wonder what that noise is when I start after a fill up?

 

Guess I better stop running all my ICE engines as starting with zero oil pressure is a reliability concern.

Seriously, without a prelube system which it not typical from OEM, how do you generate oil pressure without a crankshaft rotating? Seems we have been starting ICE since inception with 0 oil pressure until it starts.

 

How does crank shaft rotation affect oil pressure when the oil pump is electric?

 

What is your source of this information? Have a toyota part number or image for the electric pump?

from https://toyota-club.net/files/faq/19-09-10_faq_df_v6_eng.htm

 

Here is Toyota's explanation of their hybrid system
https://youtu.be/hRYWqdiUlbA?t=182

 

I forgot where he talks about it, but car care nut talks about the oil pump being electric somewhere in this video.

https://m.youtube.com/watch?v=bkXiYiGWZnE

 

That was just Google AI, and after reading a bit about it, it looks like it may be mechanically driven, electronically controlled, using about 10 psi until 3000 rpms. Then going to 40 psi above 3000 rpms.
Nevertheless, I haven't seen or heard of any TSB's or recalls, or failures due to oil starved engines in the hybrid systems going back almost 30 years.
Not trying to be the KBW, but you may be fixating on an issue that isn't there

 

The transmission has the electric oil pump not the engine. He talks about it at 10:18.

 

Nope.

 

Nope.

 

Yup. This is the correct answer.

 

That’s what it was. My bad!