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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)

  1. Failed downstream O2 sensor heater
  2. Blown fuse
  3. Wiring damage (often near exhaust)

Likely fixes

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

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