Code Definition

B2210 — Interior Lamp Override Switch Short to Ground

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

About B2210

B2210 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 B2210 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 B2210 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 B2210 fault code indicates that the body control module (BCM) has detected a short to ground condition on the interior lamp override switch input circuit. The interior lamp override switch allows the driver to manually disable dome lamp activation when doors open, and the BCM monitors the switch by applying a reference voltage and reading the circuit state. The code sets when the BCM sees the signal circuit pulled to ground continuously, rather than only when the driver actively closes the switch, indicating a permanent short between the switch signal wire and ground or a stuck switch. Wit...

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