Technical Description
Malfunction in the O2 Sensor Heater Circuit (Bank 1, Sensor 2)
What does that mean?
This diagnostic trouble code (DTC) is a generic powertrain code, which indicates that it applies to vehicles equipped with OBD-II. Although it is a generic code, the specific repair steps may vary depending on the make and model of the vehicle.
This code indicates that the heated circuit in the oxygen sensor on bank 1 is taking longer than usual to enter closed loop. Sensor #2 refers to the second sensor downstream from the engine.
When the O2 heater reaches its operating temperature, the oxygen sensor responds by switching according to the oxygen content of the exhaust surrounding it. The ECM (Engine Control Module) monitors how long it takes for the oxygen sensor to start switching. If the ECM determines (based on coolant temperature) that too much time has passed before the oxygen sensor began operating properly, it will trigger the P0141 code. See also: P0135 (Bank 1, Sensor 1).
Symptoms
You may notice poor fuel economy and the illumination of the Check Engine Light.
Causes
A code P0141 may indicate that one or more of the following issues have occurred:
Note: Typically, a failed catalytic converter does not cause this code. You are more likely to see a P0420 code for a failed converter.
