Code Definition

B0233 (01) — Airflow Control Circuit Short to Battery

System: Body  |  Type: Generic (OBD-II Standard)  |  Make: Holden

About B0233

B0233 is a generic (obd-ii standard) 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 B0233 is stored, the module has detected a short-circuit (voltage pulled to ground or to supply) in the monitored circuit; and 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.

Because B0233 is a generic OBD-II code, its base definition is shared across manufacturers. The specific diagnostic steps, reference values, and repair procedures can vary by vehicle, and the TaT Diagnostic Assistant includes verified procedures submitted by working technicians.

Code Information

The Body Control Module (BCM) or HVAC control module monitors the airflow control actuator circuit, which operates the mode or blend door to direct airflow within the HVAC system. DTC B0233:01 is set when the module detects battery voltage present on the airflow control circuit when this condition is not commanded or expected. This indicates a short to battery in the control or feedback circuit, which prevents accurate positioning of the airflow control door. When this code is set airflow may be stuck at one vent mode or blend position, the automatic climate control may not respond to mode or ...

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