P1648-vw <Instant Download>

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.

Water entering the TCM enclosure (often located under the carpet on the passenger side in Passats/Audis) causes severe corrosion and communication failure. p1648-vw

Using a wiring diagram, check continuity of the high and low CAN Bus wires (usually orange/black and orange/brown) between the TCM and ECM. 4. Typical Fixes If water ingress is minor, cleaning the connections

Secondary Air Injection System Incorrect Flow Detected. P1648. 18056. Data Bus Powertrain Malfunction. Customer. JustAnswer Jeep Grand Cherokee Diesel P0700 P1648 Codes Explained If water ingress is minor