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All codes/P0141

P0141

O2 Sensor Heater Circuit Malfunction (Bank 1 Sensor 2)

Moderate severity

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

  • Faulty O2 sensor (heater element failure)

    The heater element within the O2 sensor is a common failure point due to heat cycles.

    high

    Typical part cost: $50-200 part

  • Wiring or connector issues to the O2 sensor

    Damaged, corroded, or loose wires/connectors can interrupt the heater circuit.

    medium

    Typical part cost: $0-50 (repair)

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First things to check

  1. 1Inspect O2 sensor wiring and connector for damage or corrosion
  2. 2Check resistance of the O2 sensor heater circuit (unplugged sensor)

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Tools you may need

Already have a compatible scanner? Use it. If not, a Bluetooth OBD2 adapter can help you confirm engine codes and check supported live sensor data before replacing parts.

Illustration of a Bluetooth OBD2 adapter, not a product photo

Basic checks

Veepeak OBDCheck BLE

A Bluetooth LE adapter for reading standard engine codes and supported live data.

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Illustration of a Bluetooth OBD2 adapter, not a product photo

Regular diagnostics

vgate iCar Pro BLE 4.0

A Bluetooth LE adapter with an automatic sleep feature for routine code and sensor checks.

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Illustration of a Bluetooth OBD2 adapter, not a product photo

Another option

OBDLink CX

A Bluetooth LE adapter to consider when comparing supported vehicles and diagnostic apps.

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Illustrations shown, not product photos. Check vehicle, phone and app compatibility before buying. These adapters do not guarantee access to ABS, airbags or manufacturer-specific systems. Clearing a code does not repair the fault and can reset emissions readiness monitors.

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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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