P0141 – O2 Sensor Heater Circuit Malfunction (Bank 1 Sensor 2)

System: Emissions
Dashboard light: Check engine light (MIL)
Check-engine blink code: —
Applies to: Generic OBD-II meaning. Not every code is used by this car.
Description: O2 Sensor Heater Circuit Malfunction (Bank 1 Sensor 2)
Detection / symptoms: 1.Check engine light on 2.Light
Possible causes: 1.Open or short to ground in the wiring harness 2.O2 heater circuit wiring high resistance 3.O2 heater element resistance is high 4.Internal short or open in the heater element 5.More likely to see a 6.P0420 code 7.For a failed converter
What to check: 1.Read the code and live data with an OBD-II scanner 2.Look for exhaust or vacuum leaks and check the wiring of the sensor or valve 3.Test the part before replacing it 4.Fix the cause, clear the code and test-drive
Confidence: medium (generic OBD-II definition, not checked against the factory manual for this car)

Generic OBD-II meaning (obd-codes.com), not checked against this car's factory manual. Clear the code and test-drive to confirm it returns. Search all fault codes · Common problems · Warning lights