Has the dealer tried relearning ("memorizing") the new TPMS' using the factory scan tool?

I know this doesn't help, but the only other thing that stands out is that it appears to be pretty much exactly 1 atmosphere (14.7psi) off. Very strange 🤔

 

Two thoughts:

1. Disconnect the 12 volt battery for several seconds then reconnect to "reboot" the vehicle.

2. Rotate the tires which will force an automatic relearn.

 

Normally I would geek out on it being 1bar off, but It's a little more random. Tomorrow I'll try to accurately fill the tires and see if the randomness is the sensors or me not being careful when filling. I'll also try to disconnect the battery trick, but with all four being new I don't know that a rotation will make a difference as it already had to learn. The sensors/stems seem to leak anyway as I need to fill them once a week, never had to do that with the old tires. If all else fails I just have to pay the dealer to replace all four again, then at least I can have them troubleshoot if it doesn't work.

 

OK, issue solved, thought I'd post for anyone else having similar issues. Rahtx was right, they were 1 atm/bar/14.7psi off. Apparently that is the difference used in the 2020 Ridgeline, the sensors are NOT the same as 2017-19. Replaced the sensors with 2020 version and all is good. I read many posts on here that they are all the same, not the case. It may be possible that the 2020 are backward compatible with earlier models, can't confirm or deny, the older versions are definitely not forward compatible. 2021+, no consistency at all.

While I thought the readings were random, it was just that the tires leaked at various rates. My cheap ass watched a youtube video and changed my own stems this time, very easy using a scissor jack and the trailer hitch. Found whoever the tech was that put the first set of sensors in put the washer on the wrong side, preventing the soft rubber from making a proper seal against the rim.

 

2021+ they went to indirect tpms...

That's not correct - the 2021-2023 Ridgeline still has a direct TPMS.

The current TPMS sensor part numbers are:

42753-T6N-A01 2017-2019
42753-T6N-E03 2020
42753-T3R-A03/A04 2021-2023

 

Thanks zroger73, I edited my first post, don't want to cause more confusion. Main thing to know, is the E03 version is not an updated A01, but a completely different animal.