Conditions for Running the DTC

WARNING: This page is about a different car, the 2020 Buick Regal and 2019 Buick Regal. However, it is still accessible from the selected car via links, so may be relevant.

P018B

DTC P018C, P018D, P0231, P0232, P023F, P0641, P1255, P0129, P12A6 = Not set
Engine = Running - For greater than 5 s
Fuel Pump Enable = On

DTC runs continuously when the above conditions are met.

P018C, P018D

Ignition = On

DTCs run continuously when the above condition is met.