When I changed my wheels I had them pumped to 2.4 bar (240 kPa) and 2.8 for the front and rear respectively. And I had the RPA reset then.

Now that I found them quite hard and reduced the pressure to 2.2 and 2.5 respectively. After travelling for a few days I realised that there is no warning from RPA.

Is this how the RPA should work?

 

tategoi:
I don't think that is a problem. The tire pressure warning system is designed to identify a tire that rotates quicker than other tires due to a loss of pressure. The ABS sensors detect the change in the speed of a tire with less pressure. I would think that tires with the same pressure, even if both were lower or higher than recommended, would not set off the warning. What do you think folks?

 

That's right, it measures the relative spin rate of all 4 tires. If all four have a similar amount of air added ot removed, they should all spin at a similar speed, therefore not setting off the alarm. If one tire was reduced significantly, as in a flat situation, that wheel would spin faster than the rest, setting off the alarm.

 

OK thanks. All along I thought if the pressure is different from previously set, it will trigger off a warning.