After my bnew FLHXS underwent ceramic coating, the TPMS systems issues warning of under inflation of the rear tire is detected. I added air up to 40psi as recommended by H-D and the readings show that it has been reached. But the TPMS warning does not go off. What could have possibly gone wrong?

 

did you ride the bike at all? was the 40lbs as indicated by a tire pressure gauge or the tpms system itself? the tpms sensors will go into 'park' mode after not moving for a while and will only update once every 4 hrs. i've heard that you can 'force' an update by relieving some air pressure out of the tire and then filling it fully up again. i think it has to be something like a 5 lb variance. or you can just ride around the block.

 

After getting warning, rode it about 5 miles to gas station. Filled up rear up to 40psi and front 36psi. Still TPMS remained on. Rode for another 50miles and still TPMS remains lit up.

 

What I find odd is that when I filled up the tire, the readings for both indicated the right psi but the warning light remains on even after 50 miles of riding and still warns of under inflation of the rear tire when ignition is switched on. In other words, the sensor senses the pressure accurately yet issues a warning.

1. Can application of ceramic coating on the rims play a role on this warning?

2. How do I reset the TPMS?

 

well, it could be several things. The 36 psi front and 40 psi rear should turn off the Tpms light but that’s when tires haven’t been ridden on and warmed up. Inflate the tires when they are cold to proper pressure and toggle the trigger a few times and see if the tpms reads the correct pressure and light goes off. Your tire sensor(s) could be damaged as well. Had that happen once on a tire change and dealer had to replace the front tire sensor. Lastly, tpms can be reset by your dealer if needed. Not sure why the powder coating on the wheels would affect the tpms outside of maybe damage to the sensors when removing and installing the tires.

 

OP said Ceramic coating not powder, bike got waxed. No idea why that would do anything to the tpms though

 

You got a new bike, so it's not the TPMS battery, and they are inside the tire so not the ceramic coating. Did you use an accurate air pressure gauge when you filled the fires? The TPMS lags a bit when sending the info out, but that's not your issue. Probably another ride to the dealer is my guess.

BTW, good you got the ceramic coating. If I remember correctly some of those roads aren't quite as paved as the main cities.

 

Thanks for your reply. Before I ride back to the dealer, I will try first to deflate tire for more than 5psi before re-inflating it again to required 40psi. In another thread, many say this approach worked. If not, then visit the dealer may be in order.

You seem to know our roads here in the Philippines. Do pm me if you’re in town. Perhaps we can arrange a ride. Cheers !

 

okay, so that rules out pretty much any of the basic reasons for it. you've got some other good suggestions, be looking forward to finding out exactly what happened and why.

the only other suggestion i have, above what others have said, is to check your pressure using a second gauge to see how the reading compare with 2 separate gauges.

 

I presume it's still under warranty, it's the dealers problem