Code Definition

B1486 — Brake Pedal Input Circuit Ground Short

System: Body  |  Type: Manufacturer-Specific  |  Make: Generic

About B1486

B1486 is a manufacturer-specific body diagnostic trouble code. It belongs to the B-prefix family of codes, which covers body, interior, airbag, or comfort-electronics faults.

When B1486 is stored, the module has detected a short-circuit (voltage pulled to ground or to supply) in the monitored circuit.

Scanning & clearing: Body (B) codes are often stored in the body control module, airbag module, or climate module. A basic OBD-II tool usually will not read body codes — an enhanced or OEM-level scan tool is typically required.

B1486 is a manufacturer-specific code. The same code string on a different make may have a different meaning. Always confirm the code's definition against the vehicle's service information for the specific make and model under test.

Code Information

DTC B1486 is stored when the control module detects the brake pedal input circuit pulled to ground when it should not be, indicating a short to ground somewhere on the input wire between the switch and the module pin. The brake pedal switch routes a controlled signal between B+ and ground for the BCM, PCM, and ABS module to manage cruise control cancel, shift interlock release, brake light operation, and ABS pedal travel monitoring. A continuous low voltage on the input wire is read by the control module as the brake pedal permanently released or, on inverted logic circuits, permanently applie...

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