Trouble code
P0141
O2 Sensor Heater Circuit Malfunction (Bank 1, Sensor 2)
What P0141 means
Heater fault in the downstream oxygen sensor, the one after the catalytic converter.
Symptoms you may notice
- Check engine light
- Emissions readiness will not set
Common causes, cheapest first
- Failed heater element in the rear sensor
- Blown fuse
- Corroded connector
- Chafed wiring
Before you buy anythingSensor 2 sits after the converter and does not affect fuel trim. This code will not hurt drivability but it will stop you passing an emissions test.
What to do next
- Confirm the code with your own scan tool, or have it read free at a chain parts store.
- Decode your VIN so you know your exact engine and build date.
- Work down the causes above from cheapest to most expensive.
- Search NHTSA for a recall or service bulletin covering this symptom on your vehicle.
- Read the engine buying guide before ordering.
P0141 is a generic OBD-II code, standardized across every make and model sold in the US from 1996 onward. The meaning is the same on any vehicle; the specific part and its location are not.
Parts
Parts commonly needed for P0141
These go to Amazon. We earn a commission if you buy, at no extra cost to you — see our affiliate disclosure. Which one you actually need depends on diagnosis — read the note above first.
Confirm fitment against your VIN on the listing page before ordering. A part that matches your year and model can still be wrong for your build date or engine code.