B2139 — Data Mismatch (receive data does not match what was expected)

What it means

B2139 is an OBD-II diagnostic trouble code: Data Mismatch (receive data does not match what was expected).

Typical fix

Confirm the code with an OBD-II scanner, then inspect the component or circuit named above. Consult a vehicle-specific service manual for the full diagnostic and repair procedure.