OBD codes / P0141
P0141
ModerateO2 Sensor Heater Circuit (Bank 1, Sensor 2)
P0141 is safe to drive with — the downstream sensor mainly monitors the catalytic converter, so this doesn't affect how the car runs. Fix it at your convenience; it will fail an emissions test until resolved.
What this code means
P0141 is the heater-circuit fault for the DOWNSTREAM oxygen sensor (Bank 1, Sensor 2) — the one after the catalytic converter that monitors how well it's working. Like the upstream sensor, it has a heater so it reaches operating temperature quickly. The code means that heater isn't drawing the right current, and the cause is almost always the sensor's own failed heater element, so replacing the sensor is the typical fix. A blown fuse or a wiring fault can cause it too.
Symptoms you might notice
- Check-engine light, often with no drivability change
- No noticeable performance issue
- Possible failed emissions test
What it costs to fix
Typical range: $150–$450 · about ~0.3–1 hrs of labor
| If the cause is… | Part | Labor |
|---|---|---|
| Downstream oxygen (O2) sensor | $50–$250 | ~0.3–1 hrs |
| Fuse | $1–$10 | ~0.1–0.3 hrs |
| Wiring / connector repair | $10–$120 | ~0.5–1.5 hrs |
The downstream sensor is usually easier to reach than the upstream one, so labor is often at the low end. Check the fuse and wiring first — occasionally the fix costs almost nothing.
The price swings on which cause it turns out to be — so confirm the cause before paying. Diagnose P0141 for my exact vehicle →
Frequently asked
Can I drive with P0141?
Yes — it's low-urgency and won't change how the car drives. The downstream sensor watches the converter rather than controlling fueling, so plan the fix at your convenience, especially before an emissions test.
Does P0141 mean a new oxygen sensor?
Usually — the failed heater element is inside the sensor, so the sensor is replaced. Check the fuse and wiring first in case one of those cheap items is the actual cause.
Is P0141 the same as P0135?
Same fault, different sensor: P0135 is the upstream sensor's heater, P0141 is the downstream sensor's heater. The downstream one is usually easier (and cheaper) to access.
How much does it cost to fix P0141?
Typically a low-hundreds repair, often at the cheaper end because the rear sensor is easier to reach. Less if it's a fuse or wiring fix.
Seeing P0141 on your car? Get a diagnosis specific to your exact year, make and model.
Diagnose P0141 for my vehicleGeneric OBD-II reference. Manufacturer-specific behavior varies — confirm with a scan tool and, for safety-related codes, a professional inspection.