MasterTuning Fault code dictionary (DTC)

P1644 — Transmission control module Undervoltage Transmission version cannot be checked

Severity: Warning Can you drive? With caution: limp mode possible, have it checked soon Make: Mercedes-Benz
MeaningTransmission control module Undervoltage Transmission version cannot be checked.
FamilyPowertrain (P)

Frequently asked questions

What does code P1644 mean?

Transmission control module Undervoltage Transmission version cannot be checked. Transmission control module Undervoltage Transmission version cannot be checked.

Can I keep driving with code P1644 active?

With caution: limp mode possible, have it checked soon

How do you fix code P1644?

Diagnosis starts from reading the live ECU parameters: the code points to the fault area, not to the part to replace. A vehicle-electronics specialist can test the component and clear the code after the repair.

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