Code Definition

B2338 — Mirror Switch Assembly Circuit Short to Battery

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

About B2338

B2338 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 B2338 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 B2338 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

DTC B2338 indicates that the module monitoring the exterior mirror switch has detected one or more of the switch input lines pulled up to battery voltage when it should be sitting at its normal idle reference. The mirror switch network operates between supply voltage and ground through internal contacts or a resistor ladder, and the controlling module expects a defined voltage that varies only with switch operation. When the module reads full battery voltage on a switch return line, it identifies a short to a power feed in the switch, the harness, or the connector. Typical symptoms include the...

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

Quick Facts