MasterTuning Fault code dictionary (DTC)

B1231 — ECT sensor (B11/4)

Severity: Warning Can you drive? With caution: limp mode possible, have it checked soon Make: Mercedes-Benz
MeaningECT sensor (B11/4).
FamilyBody (B)

Frequently asked questions

What does code B1231 mean?

ECT sensor (B11/4). ECT sensor (B11/4).

Can I keep driving with code B1231 active?

With caution: limp mode possible, have it checked soon

How do you fix code B1231?

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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