P0141
Moderate severityOxygen (O2) Sensor Heater Circuit Malfunction (Bank 1, Sensor 2)
Drivable. The engine runs fine; only the heater inside the downstream O2 sensor isn’t working. Emissions readings will be off and you’ll fail inspections.
What does the P0141 code mean?
The P0141 code means the heater element inside the downstream oxygen (O2) sensor on Bank 1 is faulty. Most O2 sensors include a small electric heater that lets them reach operating temperature faster after a cold start.
The downstream sensor sits after the catalytic converter and monitors its efficiency — it’s why this code often coincides with P0420. When the heater fails, the sensor takes much longer to warm up and the computer flags it.
Can you keep driving with a P0141 code?
Yes, with care. The engine performs normally because the downstream O2 sensor mainly monitors the catalytic converter, not the fueling. You will fail an emissions inspection, though, and the issue can hide a P0420.
What causes a P0141 code?
- Faulty O2 sensor heater (inside the sensor)~60%
- Blown fuse for the O2 sensor heater circuit~15%
- Wiring or connector issue~15%
- PCM (engine computer) fault~10%
How to diagnose a P0141 (check these first)
- Check the fuse for the O2 sensor heater circuit — a $1 fix if it’s blown.
- Inspect the O2 sensor’s connector for damage or corrosion.
- Measure the heater resistance with a multimeter (compare to spec).
- Replace the downstream O2 sensor if the heater is bad.
P0141 repair cost
Typical US ranges including parts and labor (varies by vehicle):
| Fuse | $1 – $5 |
| Oxygen (O2) sensor | $100 – $350 |
| Wiring repair | $50 – $200 |
Tools & parts that help
Before buying a new sensor, check the fuse — a one-dollar fix is often all P0141 needs. A scanner clears the code after the repair.
See OBD-II scanners & O2 sensors ›P0141 — Frequently asked questions
Is it safe to drive with a P0141 code?
Yes. The engine runs normally – the heater just helps the sensor warm up faster. The car will fail emissions until it’s fixed.
What’s the cheapest thing to check?
The O2 sensor heater fuse. If it’s blown, a $1-$5 fuse fixes everything.
Will P0141 cause a P0420 too?
It can. The downstream sensor monitors the catalytic converter, so if it’s not working properly, the computer may misreport the converter’s efficiency.
How much to fix P0141?
From $1 for a fuse up to $100-$350 for a new sensor.
Related codes
General guidance based on the standard definition of the P0141 code. A real diagnosis depends on your make, model, mileage and other symptoms. When in doubt, have a professional confirm the cause before replacing expensive parts.