What does code P1647 mean?

Q: What does code P1647 mean?

Check Coding Of ECUs In Data Bus Powertrain. P1647 on Volkswagen vehicles means the engine control module (ECM) has detected a coding mismatch among the control units that share the powertrain data bus, which is the CAN network linking engine, transmission, ABS and other modules. The ECM compares the configuration or coding of each module against its expected values and sets this code when one or more modules are coded incorrectly, missing, or not communicating the expected configuration.

DTC codes / Volkswagen codes / P1647

P1647 · VolkswagenCheck Coding Of ECUs In Data Bus Powertrain

P1647 on Volkswagen vehicles means the engine control module (ECM) has detected a coding mismatch among the control units that share the powertrain data bus, which is the CAN network linking engine, transmission, ABS and other modules. The ECM compares the configuration or coding of each module against its expected values and sets this code when one or more modules are coded incorrectly, missing, or not communicating the expected configuration.

SystemPowertrain

Code typeVolkswagen specific

SeverityMedium

Fix difficultyProfessional

AreaComputer and output circuits

Guidance is general and written for Volkswagen vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.