Causes and Fixes P0140 Code: Oxygen Sensor Circuit No Activity Detected (Bank 1, Sensor 2)

How to fix P0140 Code: Oxygen Sensor Circuit No Activity Detected (Bank 1, Sensor 2) The oxygen sensors measure the oxygen content in the exhaust gases after they leave the combustion process of the engine. They also monitor the catalytic converter. A P0140 code is set when the computer (ECM/PCM) detects no voltage on the Bank 1, Sensor 2 oxygen sensor. Causes of a P0140 code include a bad oxygen sensor, wiring issues, exhaust leaks, and a damaged oxygen sensor connector. Possible Causes of a P0140 Code: Faulty 02 Sensor Bank-1 Sensor-2 Wiring - Open Short - Blown Fuse By using this information, the user assumes all risks of use.