P0839 Four Wheel Drive (4WD) Switch Circuit High
P0839 P0839 code definition The P0839 code belongs exclusively to all wheel and four wheel drive vehicles. It indicates that the powertrain control module (PCM) has identified an issue within the four wheel drive (https://www.yourmechanic.com/article/3-essential-things-to-know-about-four-wheel-drive-4wd) (https://www.yourmechanic.com/article/3-essential-things-to-know-about-four-wheel-drive-4wd) switch circuit. What the...
