Maximum PSI ?

Not with a Prius, but I've haven't seen that happen in a Camry or Sonic. Though, I might have reset the Camry's TPMS, and the Sonic's manufacture recommended psi was 38.

 

Does Prius TPMS warning come on for high pressure? For low pressure, the threshold is something like 25%. So, if it is a factory set, it would warn at or below 27 psi. If the same 25% is what it triggers at higher than the baseline, the factory set TPMS would warn at or above 45 psi. But I think you can reset the TPMS to a new baseline, can't you?

 

The TPMS does not trip for high pressure, at least at 55 PSI, which I used to have my tires at when I was commuting.

 

Did you hit the reset button after inflating the tires to that?

 

No, I didn't.

 

Nope. I have never bothered resetting the trip point so it's wherever the original owner had it -- or more likely his/her Toyota service center since it was taken there every 10k miles before I got it.

I'm assuming (maybe some risk there) that it's set at some safe level. It's one of those things that I sometimes think about investigating, but never seem to get to.

edit to add:
Also, @Rob43, did you try hitting the reset button to see if maybe that does have an effect? But I'll add that I would not want my rear tires over 40 psi. That's where I drew the line. It's arbitrary, admittedly, but I don't see that there's any gain in going higher.

 

Seems the law only requires a warning with underinflation.
Text of H.R. 5164 (106th): Transportation Recall Enhancement, Accountability, and Documentation (TREAD) Act (Passed Congress version) - GovTrack.us

The Camry SE has a pressure display for the individual tires. It reads high, as much as 5psi, and maxes out at 55psi. That could just be for the display, but it is possible that also applies to the software. Then we can have a Jurassic Park situation where the high pressure warning trigger is never triggered as the system doesn't see values over that max limit, and Jeff Goldblum ends up with a broken leg.

 

Yap, that's exactly the same TPMS I bought for my winter tire sets without internal TPMS sensors, and now have it on my summer OEM rims with OEM internal sensors. I have checked my tire pressures with manual guages and reading on this external TPMS and found them to match perfectly. Comparing to those values, OBD2 app read internal OEM TPMS sensors reported 0.9-1.4psi higher value.

 

LOL. I have to agree there. Although, I have started to think it kind looks good on the OEM hubcaps.

"Converted" is not the appropriate term, I don't think. I used elm327 obd2 adapter and app called Tire Assistant to read the data that was being sent by the internal TPMS sensors to ECU. You can do the same thing with Techstream, or with ScanGauge with X-gauge command. With X-gauge, you can see the live info while you are driving but with Trie Assistant or Techstream, the car must be parked in order to read the data. Or if you mean I did something to the external TPMS reader to "catch" the internal sensor signals, then no that is not what I did. I just have them on my OEM tires and rims which has OEM TPMS sensors inside independently of the external sensors just like you are doing.

BTW, What is "DD tire"?

 

Yeah, Yoko Avid GT is on my shortlist for next set of tires. Though I am not sure of using different tire size as you suggested. My OEM Dunlop has been holding it's tread better than the first year. I still have 5-6/32 left on them. Since I will be switching to snows in a few months, I will wait till next year for the decision on new tires. Do you have any experience with Riken tires that TireTrack rates very high?

 

You mean the Riken tires? It shows up on Tire Track recommendation at or near the top for most of my preferences. Since winter use is not needed for this set, my priorities are more on comfort and price. For those categories, it is rated better than Yoko Avid GT. I did some research on the brand, it is made by Michellin. The brand was used to be held by a Japanese tire company before taken over by Michellin.

 

Humm, really? I have no first-hand experience with this brand. But the price and high consumer reviews on this bargain tire were enticing. I was also considering Hancook Kinegy but dismissed them after seeing low scores on consumer reviews. For example, the Riken was rated far better than very popular tire amoung PRIUS drivers, Bridgestone Ecopia 422 Plus on all categories (since there is no fuel economy category in TireTrack review). I did not have very good experience with the Ecopia 422 Plus on my Gen3, so I thought the reviews are generally credible.