Code Definition

B1205 — EIC Switch-1 Assembly Circuit Failure

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

About B1205

B1205 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 B1205 is stored, the module has detected an electrical-circuit fault in the wiring, connector, or driver associated with the named component.

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.

B1205 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

The Electronic Integrated Control (EIC) module manages operation of an integrated switch assembly used for functions such as climate control, radio, or auxiliary vehicle systems depending on the platform. DTC B1205 is set when the EIC module detects an electrical failure in the Switch 1 assembly circuit, typically an open, short to ground, short to voltage, or an out of range resistance reading on the switch input. The module uses a multiplexed or resistive ladder circuit to read multiple buttons on a single wire, and any disruption to the expected voltage pattern sets this code. When this fau...

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