Conditions for Setting the DTC
WARNING: This page is about a different car, the 2019 Chevrolet Malibu. However, it is still accessible from the selected car via links, so may be relevant.
P24B9
- When the propulsion system is not active - If the difference between the EVAP system leak detection pump pressure sensor, absolute reading and the BARO value is 3 kPa (0.44 PSI) for 14 s.
- When the propulsion system is active, and after a stabilization time of 10 s - When a recent BARO update has occurred within the last 0.1 km (0.06 mi), if the difference between the EVAP system leak detection pump pressure sensor, absolute, reading and the BARO value from the MAP sensor is 15 kPa (2.17 PSI).
- When a recent BARO update has not occurred within the last 0.1 km (0.06 mi) - If the difference between the EVAP system leak detection pump pressure sensor, absolute, reading and the BARO value from the MAP sensor is 20 kPa (2.9 PSI).
P24BA
The ECM detects that the EVAP system leak detection pump pressure sensor signal is less than 0.7 V for greater than 0.1 s.
P24BB
The ECM detects that the EVAP system leak detection pump pressure sensor signal is greater than 4.85 V for greater than 0.1 s.