DTC P0141: O2 Sensor 1/2 Heater Failure: Description
WARNING: This page is about a different car, the 2000 Plymouth Breeze, 2000 Dodge Stratus, and 2000 Chrysler Cirrus. However, it is still accessible from the selected car via links, so may be relevant.
Circuit is monitored with engine idling immediately after a cold start (engine temperature less than 147°F (64°C) and battery temperature plus or minus 27°F (3°C) of engine temperature. DTC is set when O2 sensor 1/2 voltage is more than 3 volts for 30-90 seconds. Possible causes for DTC to set are: O2 sensor 1/2 connector damaged, O2 sensor 1/2 ground circuit open, ASD relay output circuit open, O2 sensor 1/2 failure or O2 sensor 1/2 heater failure.