1.6.3.2 Monitoring Function - Pressure Range Test
P303A, P303B, P303C, P303D
Additionally, the pressure is monitored for exceeding of the absolute range. When the pressure value drops below the lower calibrated threshold, a minimum fault code is set (P303C/P303D). When the pressure value exceeds the upper calibrated threshold, a maximum fault code is set (P303A/P303B).