Code Definition

B2237 — Vehicle Signal indicating Park While VSS Present

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

About B2237

B2237 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.

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 B2237 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 B2237 is set when a control module (typically the Body Control Module or the instrument cluster, depending on vehicle architecture) detects a logical conflict between the transmission gear position input indicating Park and the Vehicle Speed Sensor (VSS) signal indicating the vehicle is moving. Because the vehicle should be stationary when the transmission is in Park, the simultaneous presence of these two inputs represents an impossible state and the module sets this rationality fault. The condition is typically detected after the VSS reports vehicle speed above a small threshold (often a...

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