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

P0141 means the heater inside your downstream O2 sensor on Bank 1 has failed. Replacing the rear O2 sensor on the catalytic converter typically resolves it.

Cost range: $150–$450. Severity: low. Safe to drive? Yes, primarily affects emissions monitoring.

Most common causes of P0141

1. Failed downstream O2 heater — Replace sensor 2 on Bank 1. ($150–$400)
2. Blown sensor fuse — Check fuse box. ($1–$10)
3. Wiring damage — Inspect for heat damage. ($50–$200)

Symptoms drivers report with P0141

• CEL
• Failed emissions