Tyre pressure

[oj88]

I would rely on a dashboard tire pressure readout strictly as a backup resource, but rely first on a good gauge to get tire pressures where they need to be.

That is true if you don't have a baseline. However, once you have made a determination that the onboard TPMS and an independent tire gauge matches up their readings, it's then safe to assume that the TPMS readouts would be accurate and trustworthy.

My Accutire MS-4021B matches the TPMS readouts down to around 0.5 PSI.