P1648-vw (DIRECT)

Broken, shorted, or corroded wiring in the powertrain CAN bus network.

If water ingress is minor, cleaning the connections and drying the module can solve the issue, though the water leak (usually clogged sunroof drains) must be fixed. p1648-vw

Improperly installed alarms, stereos, or OBD2 tuning devices interfering with data lines. 2. Symptoms Check Engine Light (MIL) illumination. Broken, shorted, or corroded wiring in the powertrain