P0141 on a Toyota: Causes, Fixes & Repair Cost

🟢 Low severity · drivable

Safe to drive; this code only affects how fast the oxygen sensor warms up, not how the car runs.

What P0141 means on a Toyota

On a Toyota, P0141 means the heater circuit inside the bank 1 downstream oxygen sensor (sensor 2) has failed. The heater just warms the sensor up faster after a cold start, so the car still drives normally, but the sensor reads slowly until it heats up on its own.

Is P0141 common on Toyotas?

P0141 shows up on Toyotas with higher mileage, often on Camry, Corolla, RAV4, and Highlander models. The heater element inside the downstream sensor burns out as the sensor ages. Wiring or connector damage near the exhaust is a less common cause.

Commonly reported on: Camry, Corolla, RAV4, Highlander.

Symptoms

Check engine light is on
No change in how the car drives
Failed emissions test
Slightly higher fuel use until the sensor warms up

Common causes

most common: Heater element burned out inside the oxygen sensor
common: Damaged wiring or connector near the sensor
less common: Blown O2 sensor heater fuse
rare: Bad ground in the heater circuit

How to fix it

Fix	DIY?	Typical cost
Replace the bank 1 downstream oxygen sensor	Yes	$80–200
Repair the sensor wiring or connector	Mechanic	$100–250
Replace the O2 sensor heater fuse	Yes	$5–15