r/PriusPrime

repost: new prius prime owner, EV and HV mode questions

reposting from a diff subreddit!

just got a new 2026 prius phev as a long term investment to hopefully cut down on gas & had some questions

assuming i’ve manually switched to ev mode (not ev/hv auto), i saw some ppl say that hv mode kicks in when you accelerate too hard or exceed maybe 85mph, but also saw others say that it’ll only activate if temps outside reach -10C …can anyone confirm or offer other perspectives?

or does the above only apply if i’m on ev/hv auto? meaning i cld theoretically & manually force ev mode at any time, it‘s just that my battery wld drain faster under high speed/cold temp conditions?

any other insights appreciated! trying to get a grasp of being an ev user

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u/jlsxin — 1 day ago

Is there a 'best' tire pressure?

2026 XSE Premium Prime owner here. I know Toyota lists what the recommended tire pressure should be, but I wanted to ask some of my fellow Prius nerds if they've found the magical pressure number for their factory wheel/tire combo.

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u/Eisenhammer007 — 1 day ago

Breaks after 3.5 years, 40k km

The Toyota garage says 40% breaking power. 1.5k CAD to change everything. Yeah, the motor breaks most of the time and regular break doesn't get used... Anyways. I hoped to spend more time without 1k+ repairs.

u/Different-Cover4819 — 1 day ago

New (to me) 2021 Prius prime quit on the highway

These codes came up - anyone have this happen? Hoping it won’t be a fortune to fix.

u/Repulsive_Mine9296 — 2 days ago

Ideas to reduce noise

Took a long drive this past long weekend in our new 2026 prime SE, knew that it will be loud inside, but the lack of noise dampening made us very uncomfortable. Not sure if it is the ecopia tires. What have you all done to improve the noise dampening? Looking for ideas.

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u/Iwantalloem — 2 days ago

Joined the club this weekend. Used '25 XSE Premium in Canada, 16k km, 41k all in.

Anyone got tips on things I should know on my PP?

Also a few questions:

  1. I am unable to remove the previous owners from the Toyota profile of my car and make myself the primary driver even after linking via the Toyota app.

Edit: I found another reddit thread suggestion which worked for me. You just have to email backoffice@toyotaconnected.com with the VIN no. of the car in the subject line. In the email, also add that you would like to reset the profile along with 1. Driver's full name, 2. Address, 3. Phone number 4. Attached copy of Ownership or Purchase agreement, 5. Attached copy of driving license of the primary driver. I got a response in under an hour with an email stating that the profile was refreshed and I could register again.

  1. Toyota homelink does not seem to be getting setup using my apartment building's key fob.

Anyone got tips for how to get this fixed + anything related to the "must know" things as a PP owner is appreciated!

u/ImaginaryBrother9317 — 3 days ago

Level 1 charger won’t unplug

Our home charger will not come out of the charging port in 2017 Prius prime. Brute force, locking and unlocking the car, manual release lever all do not work. What else can we try? The car will not shift into drive or neutral until the plug comes out so we cannot drive it to a mechanic or get it towed.

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u/green-toed — 3 days ago

Why did Toyota go with that golf cart horn?

I just swapped out the OEM horn for the 08522-B1010; much better.

My 2012 Prius had dual horns; while not exactly "commanding" they were better than the cartoonish single horn in my 2024 Prime. The 2024 has the threaded mount for a second horn, so it's not as if they'd need to redesign anything to have them.

Is the single horn just Toyota penny-pinching, or was there a good reason to go with it? The OEM horn is also smaller than either of the two replacements, but it isn't as if they needed the room.

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u/Scott_A_R — 5 days ago

(Partially) debadged prime!

Decided to leave the “prime” logo for now since I think it’s kinda cool but might remove later.

The process was easy to get the letters off - used a blow dryer and heated up the letters, then used floss to remove each letter and it came off quite easy.

The residue on the other hand was a PITA! Have a gentle plastic scraper on hand (I used a scraper wrapped in cloth to protect the paint) and then tons of elbow grease with goo gone. Process overall took me about 30 minutes and a couple beers. Then I put a fresh coat of wax after wiping it all down and it came out fantastic. No traces left at all.

Maybe I’ll get tailgated/road raged less since they won’t be triggered by the “PRIUS” large letters in their faces anymore. I doubt it though, people still be dicks out there. Be safe y’all!

u/VelosterNDCT — 6 days ago

Just bought today! 2017 advanced trim, 96k miles! How are you guys keeping your white seats clean?

u/Tonyozzie — 6 days ago

Looking for advice on how to best maximize efficiency while driving?

Hello,

I've a 2025 Prius Plugin XSE Premium getting delivered tomorrow. I've test driven the vehicle a lot but id still love some inputs from experienced drivers of the new XSE premium on how to maximize my efficiency. Here's what my week looks like normally:

  1. Drive to work 27km one way (mix of highway + city) and return for a total of 54km --- 3 days a week

  2. Drive to my sports club about 20km one way and return for a total of 40km (mostly highway driving) --- 2 days a week

From the above I am anticipating an average of under 250km per week.

What mode should I drive in ? Should I just leave it on Auto and let the car do it's thing? Need advice as I've never owned a Plug in hybrid before.

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u/ImaginaryBrother9317 — 6 days ago

prius prime 2020 won't start

I have loved my 2020 prius prime . So easy to drive ! so easy to park, love the plug in part.

The only problem I have had is that randomly the engine will not start. This problem started last summer. If we jump it, it runs fine.

We jumped it and took to dealership, they said the battery was dead and sold us a new battery (installed it). We drove it home. It still had the problem where it will not start, even right away after the new battery was installed. we jumped it and drove it back to dealership and they said there is nothing wrong with it.

It was fine for a while.

again a few nights ago, I picked my son up from soccer practice and the car would not start. My partner had to come over and help us jump start it.

Well now I am considering trading it in for a new one because I can't have a car that will not start randomly! Do you have any ideas what the problem could be? It feels like a waste to trade it in now, I love driving this car. Our other car is in disrepair and needs to be replaced; I can't replace both of them at the same time.. Thank you for any advice.

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u/Perfect_Payment4936 — 6 days ago

For a Prius Prime, this is daggone ATROCIOUS. I turned on Eco Mode just before I took this picture. Remember to keep your Eco Mode turned on at all times, you all!

I don't plug in anymore and fueled up exactly 280.3 miles ago. This is horrific for a hybrid like a Prius, especially when fuel is now over $4/gallon.

I MUST leave the air conditioner on at all times. I don't do well with the summer heat.

I then remembered to turn Eco Mode on. My memory lapse costs me a lot in gas nowadays.

u/DunDonese — 6 days ago

My Room Mode Confusion

UPDATE: My Room Mode Screen Is Normal — And A Note About Trusting AI
Quick update for anyone who saw my earlier post about trying to initiate My Room Mode on my 2025 Prius Prime and getting spooked by warning lights.
The screen is completely normal.
The steering indicator and the check light appearing in My Room Mode are expected. The car isn’t fully powered — you’re parked, using it as a climate-controlled room. Steering’s off because you’re stationary. The indicators reflect the actual state of the vehicle. Multiple people on Facebook and Reddit confirmed this from their own cars. Thank you.

About Gemini.
Gemini told me confidently I was NOT in My Room Mode, that I risked draining my 12V battery, and that the lights signaled a real problem. When I pushed and asked it to quote the manual directly, it invented the quote. Fabricated citations. Presented made-up text with the confidence of a mechanic who just looked it up.
When the community corrected the record and I brought it back to Gemini, it acknowledged the error. Flatly. Like it had spilled coffee and wiped it up.
I use AI constantly. I find it genuinely useful. But Gemini handed me a confident, detailed, wrong answer — and then made up a source to back it — on a question that real owners resolved in twenty minutes from lived experience.
Start with AI if you want. Trust the community to close the loop.

OP
Doing everything by the book on my 2025 Prius prime. Trying to initiate my room Mode. Charging at a level two charger, battery is at 22%, push the power button twice without the brake, prompt comes up asking do I want to enter my room Mode, I select yes, and then I get the screen shown in the attached image. The check engine light and the power steering Light is on. A Gemini search says that I am in fact NOT in My Room Mode. Gemini suggests that I will drain my 12 V battery if I run any accessories while the check engine light is on… Any thoughts here?

u/brent721 — 8 days ago

2022 Prius Prime Limited Reliability

Ive been in the market trying to buy a prius and found a 2022 Prius Prime Limited with 89k miles and dealer is asking 20k. How is the reliability on the battery at this point in time or anything I should be wary of? In my opinion its a little on the higher side for miles. If anyone has advice or helpful information please let me know! Thank you!

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u/MrHiguy01 — 8 days ago

2024 prime / Brake or Battery??

Just finished washing my car and tried to back it into the garage and now this is happening? Told my wife and she said she experienced the brakes slipping at one point previously but I haven’t. Is this a bigger issue than a battery? Having it towed to Toyota. Only have 38k on the odometer.

u/Superb-Relief — 10 days ago

Close to pulling the trigger on a ‘26 Prius PHEV SE - should I do it?

After essentially a month of deliberation, as well as reaching out to more or less all dealers in my area, I’ve gotten what I think is a very good deal - $36k CAD OTD (roughly $26k USD) for an SE.

My wife’s current car is a 15-year old Scion with roughly 140k km (87k miles). The car runs fine and hasn’t given us any issues.

This is what we’re struggling with - keep her current car since it’s problem-free, or take advantage of this Prius deal that has better safety and newer tech? Not to mention better fuel economy in these times we live in.

We’re leaning towards upgrading to the Prius, and so wanted to see if anyone’s been in the same situation.

Thanks!

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u/onboost — 12 days ago

Solar roof review after a couple years?

My question is for the people that have had their Prius prime for 2 or more years and have the solar roof option. How has it held up after 2 years? Do you regret the option? I live in SoCal so considering how much sun we get, it’s definitely something I’m considering when looking at this car

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u/Automatic-Tiger8584 — 11 days ago

How did I only average 32.828 MPG in my last tank of gas?

Does it need some kinda tune up? What should be fixed or replaced?

I run the car for plenty of hours at a time 5 days a week because I deliver for Doordash. I drive on average around 400-500 miles a week, mostly for Doordash. I start in the early afternoons normally, or sometimes right around noon, and rarely before noon, and Dash to around 9-10 PM.

I don't plug in anymore unless I'm at Mom's house because I paid more than $100 extra for electricity the last full billing cycle that I plugged in my car. That amounted to around 20-25 cents per mile on the electric alone. Evergy is a huge ripoff on EV charging.

Also, what other metrics should I measure in this Fueling log from now on?


Edit: To all our Metric friends out here, that is 13.957 kilometers per liter.

u/DunDonese — 11 days ago