Conditions for Running the DTC

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2018 GMC Yukon XL, 2018 GMC Yukon, 2018 Chevrolet Tahoe, 2018 Chevrolet Suburban, and 2018 Cadillac Escalade ESV. However, it is still accessible from the selected car via links, so may be relevant.

DTC P018B, P018C, P018D, P0231, P0232, P023F, P0641, P0606, P1255, P129E or P12A6 are not active.
Fuel pump control is enabled and the fuel pump control state is normal.
The ignition voltage is between 11 - 32 V.
The engine has been running for greater than 30 s.
The engine fuel flow is not 0.
Low fuel level warning not present.
The DTC runs continuously when the conditions above are met.