P0146 CADILLAC O2 Sensor Circuit No Activity Detected Bank 1 Sensor 3
Possible causes – Faulty Heated Oxygen Sensor Bank 1 Sensor 3– Heated Oxygen Sensor Bank 1 Sensor 3 harness is open or shorted– Heated Oxygen Sensor Bank 1 Sensor 3 circuit poor electrical connection Tech notes Replacing the O2 Sensor