2013 Cadillac ATS: Tire Pressure Monitor Issue Redux
October 28, 2013
After Mr. Oldham observed what he suggested was an anomalous TPMS (Tire Pressure Monitoring System) in our long-term 2013 Cadillac ATS, I was intrigued. So I gave it a whirl.
First thing on a cool morning I measured the tire pressures with my trusty gauge. Then I fired up the ATS and looked at the pressures reported by the car's TPMS.
The result? My gauge consistently read one psi lower than what the TPMS reported for each tire, a result which I consider to be well within any reasonable expectation of gauge-to-gauge variability.
Doesn't mean nothing's wrong, mind you. Just goes to show that there is a LOT of variability among tire pressure gauges, be they handheld or transducer-based.
Jason Kavanagh, Engineering Editor