Engines need the right amount of air and fuel to operate efficiently. To measure the air/fuel mixture, Oxygen (O2) Sensors are used to provide the vehicle’s computer with information related to the mixture. The PCM makes the necessary fuel adjustments so that the mixture is the right one.
The setting of diagnostic code P2097 OBD2 indicates that the PCM (Powertrain Control Module) found a signal voltage input on the post-catalyst Oxygen (O2) Sensor of bank number 1. This voltage input implies that the oxygen particle content is excessively low.