Possible causes – Faulty Air-Fuel Ratio (A/F) Sensor Bank 2 Sensor 1– Air-Fuel Ratio (A/F) Sensor Bank 2 Sensor 1 harness is open or shorted– Air-Fuel Ratio (A/F) Sensor Bank 2 Sensor 1 circuit poor electrical connection – Faulty Engine Control Module (ECM) When is the obd code mean? The P1155 is set when the…