OXYGEN SENSOR faults

When the OXYGEN SENSOR FAILS, the engine presents particular symptoms that should serve as guidance to resolve the problem.
If the oxygen sensor fails, it is very possible that the air and gasoline mixture becomes lean, causing the engine to lose power and the acceleration response to be very slow.
If the failure of the oxygen sensor leads to enrichment of the air-gas mixture then the engine will not show loss of power but the gas mileage will be poor.
Broken wires, loose terminals, sulfated wires, wiring short circuits or open circuits will not allow a correct connection of the oxygen sensor.
On the other hand, if the oxygen sensor shows a lack of activity with codes P0133 (2-wire oxygen sensor) and PO140 (4-wire sensor), it must be replaced with a new one.
If the scanner continues to show a low sensor voltage (P0131 2-pin sensor, P0137 4-pin sensor) or a high voltage (P0132 2-wire sensor, P0138 4-wire sensor) then the oxygen sensor should be replaced with a new or good one. operation to solve the problem.