On Board Diagnostics - How Accurate?
 

My new GMC Yukon has on board diagnostics that have the capability of telling me way more info than I probably care to know [img]<<GRAEMLIN_URL>>/rolleyes.gif[/img] 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 [img]<<GRAEMLIN_URL>>/dunno.gif[/img]

Re: On Board Diagnostics - How Accurate?
 

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..

Re: On Board Diagnostics - How Accurate?
 

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

Jan

Re: On Board Diagnostics - How Accurate?
 

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