P0140 MITSUBISHI Cylinder 1-4 Heated Oxygen Rear Sensor No Activity Detected

Possible causes – Faulty Rear Heated Oxygen Sensor Bank 1– Rear Heated Oxygen Sensor Bank 1 harness is open or shorted– Rear Heated Oxygen Sensor Bank 1 circuit poor electrical connection– Inappropriate fuel pressure– Faulty fuel injectors– Intake air leaks

Read More P0140 MITSUBISHI Cylinder 1-4 Heated Oxygen Rear Sensor No Activity Detected