Conditions for Setting the DTC

P2430 

The ECM determines that the pressure sensor value change at the shutoff/check valve is less than 0.5 kPa and the signal variation is less than 0.15 kPa for greater than 5 s when the secondary air injection pump is commanded ON.

P2431

• The difference between the actual system pressure at the shutoff/check valve and BARO is greater than 18 kPa (2.6 psi) or less than -10 kPa -1.5 psi) for greater than 5 s when the secondary air injection pump is commanded OFF.

  OR

• The difference between the actual system pressure at the shutoff/check valve and BARO is greater than 50 kPa (7.3 psi) for greater than 5 s when the secondary air injection pump is commanded ON.