What Does the Trouble Code P0141 Mean?

The trouble code P0141 means an O2 sensor heater circuit malfunction in bank 1 sensor 2. It is a code that appears in a range of different cars.

The oxygen sensor in a car does not start operating properly until the car has warmed up. The car's engine control module, or ECM, monitors this and measures how long the sensor takes to start working. It knows this based on factory information and the temperature of the coolant in the vehicle. If the oxygen sensor is taking longer than it should to start operating, it reports the trouble code P0141. Replacing the oxygen sensor is a common fix for this problem. Often the engine light comes on and the car's fuel economy is not what it should be, meaning it consumes more fuel.

Possible causes

  • Faulty O2 heater element
  • Short circuit in the heater element
  • Heated oxygen sensor bank 1 sensor 2 circuit fuse - this can sometimes get blown when water gets into the heated oxygen sensor connector
  • Poor electrical connection in the heated oxygen sensor
  • Faulty engine control module

This code appears in a range of different cars, including Acura, Audi, BMW, Buick, Cadillac, Chevrolet, Chrysler, Dodge, Ford, GMC, Honda, Hummer, Hyundai, Infiniti, Isuzu, Jeep, Kia, Lexus, Mazda, Mercedes-Benz, Mitsubishi, Pontiac, Nissan Saturn, Scion, Toyota and Volkswagen.