What does code P1749 mean?

Q: What does code P1749 mean?

Transmission Control Unit Incorrect Coding. P1749 on Volkswagen vehicles means the Transmission Control Module (TCM) has detected that its internal coding or configuration data does not match the vehicle's expected setup. The TCM compares its stored coding against the vehicle's configuration and flags an incorrect or missing coding value, which can disable adaptive shift strategies or place the transmission in a limp-home mode.

DTC codes / Volkswagen codes / P1749

P1749 · VolkswagenTransmission Control Unit Incorrect Coding

P1749 on Volkswagen vehicles means the Transmission Control Module (TCM) has detected that its internal coding or configuration data does not match the vehicle's expected setup. The TCM compares its stored coding against the vehicle's configuration and flags an incorrect or missing coding value, which can disable adaptive shift strategies or place the transmission in a limp-home mode.

SystemPowertrain

Code typeVolkswagen specific

SeverityMedium

Fix difficultyProfessional

AreaTransmission

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