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

What it means

The heater in the downstream (after the converter) O2 sensor on bank 1 has failed or has a circuit problem.

Severity: Low

Can I drive it? Safe to drive; may affect emissions testing.

Common causes (most likely first)

Failed downstream O2 sensor heater
Blown fuse
Wiring damage (often near exhaust)

Likely fixes

Check fuse and wiring
Replace downstream O2 sensor

DIY parts cost

$30–$150

Approximate estimate

Shop repair cost

$150–$400

Approximate estimate, parts + labor

DIY difficulty

Easy to Moderate

Varies by vehicle

Cost ranges are rough, approximate U.S. estimates and vary widely by vehicle, region, and parts brand. Always confirm the diagnosis before buying parts.

Parts you may need

Downstream oxygen sensorCheck price
O2 sensor socketCheck price

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