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.
Stop driving if: the check engine light is flashing, or the car starts running noticeably worse
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?
Listed in the order most shops would check them — cheapest and most likely first, not as statistical odds. The real cause varies by year, make, model and engine.
- PCM (engine computer) faultCheck 1st
- Wiring or connector issueCheck 2nd
- Blown fuse for the O2 sensor heater circuitCheck 3rd
- Faulty O2 sensor heater (inside the sensor)Check last
How to diagnose a P0141 (check these first)
- Check the fuse for the O2 sensor heater circuit — a 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):
Costs vary a lot by vehicle and region. These are typical US ranges including parts and labor — treat them as a ballpark for the conversation with your shop, not a quote.
| Fuse | – |
| Oxygen (O2) sensor | 0 – 0 |
| Wiring repair | – 0 |
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 top-rated OBD-II scanners ›As an Amazon Associate I earn from qualifying purchases. This costs you nothing extra and never changes what we recommend.
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
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
Related codes
General guidance based on the standard SAE definition of the P0141 code. A real diagnosis depends on your make, model, year, engine and other symptoms. This is not a substitute for a professional inspection — when in doubt, have a technician confirm the cause before replacing expensive parts.