TPMS vs hand gauge and nitrogen questions

[lord journey]

Hello family!!

I really need your help with a question about the TPMS and the hand gauge that I always use.

All my mopars are not equiped with tpms, only the basic alarm. But now, as you know, my 2012 Journey show each PSI in each tire with the TPMS.

my hand gauge is vey acurate... is a "monkey grip" brand. But now, with my new Journey, I checked with the hand gauge and I read 31 PSI. The EVIC in my dashboard shows 42... is the EVIC an acurate device?!!? I´m very worried about the correct tire presure in my Journey.

BTW, in all cars I always fill the tires with Nitrogen... I really like to use it, but in my Journey...Can I fill with nitrogen? I can´t remember where, but I read something that the sensor located in the rim, can get the correct info... but I don´t believe, I want your opinion, if the nitrogen can affect the TPMS sensor in each rim.

regards and thanx!!!

[onecrazyfoo4u]

Mine is filled with nitrogen, no problems. My hand gauge is usually 1-2psi off from the TPMS system. Not sure which one is more accurate though.

[bramfrank]

I have two precision gauges from different companies that read in 0.1 pound increments - the TPMS display is in 1 pound increments - when all tires are set to 37.1 poounds the display reads 37 all around.

The air is already more than 78% nitrogen . . . if it was going to affect the TPMS having more 3/4 of all the gas being Nitrogen would have affected it already . . . . I personally feel that Nitrogen is a marketing gimick.