Code Definition

B1112 — Ignition Voltage Low

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

About B1112

B1112 is a manufacturer-specific body diagnostic trouble code recorded for Kia vehicles. It belongs to the B-prefix family of codes, which covers body, interior, airbag, or comfort-electronics faults.

When B1112 is stored, the module has detected a signal or supply voltage lower than the expected operating range.

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.

B1112 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 vehicle's control module (typically the Body Control Module or the Instrument Cluster) monitors the ignition supply voltage on its dedicated ignition feed to verify adequate voltage is present when the key is in the RUN or START position. This ignition feed is separate from the battery hot feed and is switched on only when the ignition is active, supplying power to the logic circuits that require key on awareness. DTC B1112 is logged when the measured ignition voltage falls below the manufacturer threshold (typically below 9V) for longer than a defined duration such as 0.5 seconds, indicat...

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