Code Definition

B144C — Inverted Run/Start Power Relay Circuit

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

About B144C

B144C is a manufacturer-specific body diagnostic trouble code recorded for Holden vehicles. It belongs to the B-prefix family of codes, which covers body, interior, airbag, or comfort-electronics faults.

When B144C 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.

B144C 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 Body Control Module (BCM, also called the Power Mode Master on some Holden platforms) commands the Run and Start power relay and monitors a status feedback line to confirm the actual relay state. DTC B144C is logged when, with the ignition in run or start, the sensed voltage on the feedback line indicates the opposite (inverted) state to the commanded state, or is out of range due to an open circuit, short to battery, or short to ground on the control or feedback circuits for a calibrated period. The Run and Start relay supplies power to the engine management system, fuel pump driver, and ...

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