Code Definition

B0202 — Recirculation Control Circuit Short to Ground

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

About B0202

B0202 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 B0202 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 B0202 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 recirculation air door in the HVAC housing selects between fresh outside air and air recirculated from inside the cabin, and it is positioned by a small bidirectional DC actuator fitted with an integral position-feedback potentiometer. The HVAC control module drives the actuator motor using internal high-side or low-side drivers and continuously monitors the drive circuit voltage to verify the wiring and motor are behaving as expected. DTC B0202 is set specifically when the module detects that one of the recirculation actuator control wires is shorted to ground — the drive voltage on the...

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