Code Definition

B0223 — Air Mix Door Actuator Circuit Short to Ground

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

About B0223

B0223 is a generic (obd-ii standard) body diagnostic trouble code. It belongs to the B-prefix family of codes, which covers body, interior, airbag, or comfort-electronics faults.

When B0223 is stored, the module has detected a short-circuit (voltage pulled to ground or to supply) 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.

Because B0223 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

This DTC is set by the HVAC control module when it detects a short-to-ground condition on the air mix (temperature blend) door actuator circuit. The air mix door controls the proportion of heated and cooled air delivered into the cabin, and its position is driven by a small electric actuator that reports back to the HVAC module via a feedback signal. The module monitors the drive and feedback circuits continuously, and the fault is triggered when the signal voltage drops abnormally low due to a direct short to chassis ground. When this code is set the driver may notice the temperature cannot b...

Join TaT to view the complete code information and diagnostic details.

Quick Facts