MasterTuning Fault code dictionary (DTC)

3E91 — Crankshaft RPM - Wrong Signal

Severity: Serious Can you drive? With caution: limp mode possible, have it checked soon Make: BMW
MeaningCrankshaft RPM - Wrong Signal.
FamilyManufacturer-native code

Frequently asked questions

What does code 3E91 mean?

Crankshaft RPM - Wrong Signal. Crankshaft RPM - Wrong Signal.

Can I keep driving with code 3E91 active?

With caution: limp mode possible, have it checked soon

How do you fix code 3E91?

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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