What P2287 usually means
P2287 is a high-intent diesel-style code because it often sits behind hard starts, stalling, or an engine that will not build the oil or rail-related control pressure the system needs to fire injectors correctly. The exact subsystem varies by platform, but the theme stays the same: the PCM is losing trust in injector control pressure feedback. That can be a sensor issue, wiring dropout, oil-side high-pressure problem, leaking fitting, weak pump behavior, or voltage noise that makes a real pressure signal look intermittent. The practical split is whether the pressure truly is unstable or whether the measurement path is lying about it.