On Sunday, got engine error code P2097.
Post catalyst fuel trim system too rich bank. Probable cause 1. Rich Air/Fuel ratio - Leaking injectors, regulator, high fuel pressure. 2. Incomplete combustion - Ignition or mechanical condition. 3. Failed H02S (Heated oxygen sensor)
At this point I just disconnected my battery for few minutes to do a complete reset to see how quickly error code comes back. I did clean air filter as it was quite filthy; have been meaning to replace it since the beginning of summer.