P0141 Code: Meaning, Symptoms, Causes & Fixes
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Causes ranked by likelihood
| Cause | Likelihood | DIY difficulty |
|---|---|---|
| Failed downstream O2 heater — Replace sensor 2 on Bank 1. | Most likely | 2/5 |
| Blown sensor fuse — Check fuse box. | Possible | 2/5 |
| Wiring damage — Inspect for heat damage. | Less likely | 2/5 |
Symptoms of P0141
- CEL
- Failed emissions
How to diagnose P0141
- Confirm the code. Read P0141 with an OBD-II scanner and note the freeze-frame data (speed, temperature, load) recorded when it set.
- Check for companion codes. Look for other stored or pending codes such as P0135, P0420 — they often point to one shared root cause.
- Check: Blown sensor fuse. Check fuse box.
- Check: Wiring damage. Inspect for heat damage.
- Check: Failed downstream O2 heater. Replace sensor 2 on Bank 1.
- Clear and verify. After the repair, clear the code and complete a full drive cycle to confirm P0141 does not return.
Can I drive with P0141?
Yes, primarily affects emissions monitoring.
Related codes
Frequently asked questions
What does P0141 mean?
P0141 means 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.
Can I drive with code P0141?
Yes, primarily affects emissions monitoring.
What is the most common cause of P0141?
Failed downstream O2 heater — Replace sensor 2 on Bank 1.
What are the symptoms of P0141?
CEL, Failed emissions.
How much does it cost to fix P0141?
A typical shop repair range is $150–$450, depending on which cause it turns out to be. Cheaper causes such as wiring damage should be ruled out first.