Code P0451
P0451 (https://www.yourmechanic.com/article/p0451-obd-ii-trouble-code-evaporative-emission-control-system-pressure-sensor-range-performance-by-valerie-johnston) will set if the PCM (powertrain control module) detects an incorrect, erratic, or otherwise improper voltage signal from the evaporative emission control system pressure sensor. The underlying cause is usually due to a defect in, or damage to,...