P0040: O2 Sensor Signals Swapped Bank 1 Sensor 1/ Bank 2 Sensor 1

P0040 is a generic powertrain diagnostic trouble code: O2 Sensor Signals Swapped Bank 1 Sensor 1/ Bank 2 Sensor 1.

Detailed diagnostic information for this code has not been added yet. Consult your vehicle's service manual or a qualified mechanic for specific guidance.