Conditions for Setting the DTC
WARNING: This page is about a different car, the 2019 Buick Cascada, 2018 Buick Cascada, and 2017 Buick Cascada. However, it is still accessible from the selected car via links, so may be relevant.
P257D
The engine control module detects a plausibility error between the observed hood ajar position and the reported hood ajar position.
P257E
The engine control module detects a short to ground in the hood ajar signal input to the engine control module.
P257F
The engine control module detects a short to voltage or an open/high resistance in the hood ajar signal input to the engine control module.