Code Definition

B1484 — Brake Pedal Input Open Circuit

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

About B1484

B1484 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 B1484 is stored, the module has detected an open (broken or disconnected) electrical path 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.

B1484 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 B1484 is stored when the control module detects a continuously open condition on the brake pedal input circuit. The brake pedal switch sends pedal apply status to the BCM, PCM, and ABS module so they can manage cruise control cancel, shift interlock, brake light operation, ABS pedal travel monitoring, and engine stop start logic. Unlike a rationality fault, this code specifically indicates the input is permanently in the open state, meaning the module is not seeing the expected current flow through the circuit when the pedal is pressed or at rest, depending on the design. The driver may no...

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