Let's break that down:
* P0141: This is the standardized OBD-II trouble code.
* Bank 1: Refers to the side of the engine containing cylinder #1.
* Sensor 2: This is the downstream O2 sensor. Downstream sensors monitor the catalytic converter's efficiency. Upstream sensors (sensor 1) monitor the exhaust gases immediately after the engine.
* O2 Sensor Heater Circuit: The O2 sensor has a heater element that warms it up quickly to operating temperature, allowing for more accurate readings, especially when the engine is cold. This code means there's a problem with the electrical circuit that powers this heater.
The problem could be:
* Faulty O2 sensor: The sensor itself might be bad and needs replacement.
* Wiring problem: A broken wire, short circuit, or poor connection in the wiring harness leading to the sensor.
* Bad O2 sensor connector: Corrosion or damage to the connector can interrupt the circuit.
* PCM (Powertrain Control Module) issue: In rare cases, a problem with the PCM itself could be causing the code. This is less likely than the other possibilities.
To fix it, you'll likely need to:
1. Inspect the wiring: Carefully check the wiring and connector for any visible damage, corrosion, or loose connections.
2. Check the sensor: Test the O2 sensor itself using an OBD-II scanner or a multimeter.
3. Replace the O2 sensor: If the sensor or wiring is faulty, it'll need to be replaced.
It's always a good idea to clear the code after repairs and run the engine for a while to see if the code returns. If it does, further investigation is needed. A qualified mechanic can diagnose and repair the issue if you're not comfortable doing it yourself.
