MasterTuning Fault code dictionary (DTC)

B1809 — Lamp Tail Output Circuit Short To Ground

Severity: Informational Can you drive? With caution: limp mode possible, have it checked soon Make: All makes (OBD-II standard)
MeaningLamp Tail Output Circuit Short To Ground.
FamilyBody (B)

Frequently asked questions

What does code B1809 mean?

Lamp Tail Output Circuit Short To Ground. Lamp Tail Output Circuit Short To Ground.

Can I keep driving with code B1809 active?

With caution: limp mode possible, have it checked soon

How do you fix code B1809?

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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