P0141
O2 Sensor Heater Circuit Malfunction (Bank 1 Sensor 2)
This means the heater inside the oxygen sensor located AFTER the catalytic converter on Bank 1 isn't working, preventing the sensor from reaching its operating temperature quickly.
The Powertrain Control Module (PCM) has detected a malfunction in the heater circuit of the downstream oxygen sensor on Bank 1.
Common causes
- high
Faulty O2 sensor (heater element failure)
The heater element within the O2 sensor is a common failure point due to heat cycles.
Typical part cost: $50-200 part
- medium
Wiring or connector issues to the O2 sensor
Damaged, corroded, or loose wires/connectors can interrupt the heater circuit.
Typical part cost: $0-50 (repair)
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First things to check
- 1Inspect O2 sensor wiring and connector for damage or corrosion
- 2Check resistance of the O2 sensor heater circuit (unplugged sensor)
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Related codes
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Frequently asked questions
What does 'Bank 1 Sensor 2' mean?
Bank 1 is the side of the engine with cylinder #1. Sensor 2 is the downstream oxygen sensor, located AFTER the catalytic converter, primarily monitoring its efficiency.
Will a P0141 code affect my car's performance?
No, a P0141 code typically does not affect engine performance or fuel economy directly, as Sensor 2 is mainly for monitoring the catalytic converter's function.
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