On Board Diagnostics - How Accurate?

[Bill Pritchard]

My new GMC Yukon has on board diagnostics that have the capability of telling me way more info than I probably care to know <<GRAEMLIN_URL>>/rolleyes.gif Does anyone know how accurate the OBD tire pressure monitoring is on these new vehicles? It tells me I need to inflate my tires a few pounds, but my somewhat pricey tire inflator with built in analog gage says they're OK, and I'm not sure which to believe <<GRAEMLIN_URL>>/dunno.gif

[flyingn]

The factory sensors are fairly accurate. There are separate ones for each tire and if all 4 says your low.. then Id say you are..

[jannes_z-28]

I would say that your analog gauge has more fault tolerance than the digital ones. Trust the new technology!

Jan

[Rixls6]

I compared my `09 Malibu OBD tire pressures against my old tire gauge, and they were nearly identical readings.