Malfunction Threshold

One of these conditions is met.

• The FTP sensor output fluctuates by 0.6 kPa (5 mmHg, 0.1 in.Hg) or more, or -0.6 kPa (-5 mmHg, -0.1 in.Hg) or less for at least 3 seconds.
• The FTP sensor output value is -1.3 kPa (-10 mmHg, -0.3 in.Hg) or less for at least 3 seconds.