P0141 Error Code
📋 What Does P0141 Mean?
O2 Sensor Heater Circuit Malfunction (Bank 1, Sensor 2) — the heater element in the downstream O2 sensor has failed.
🔍 Common Causes
- 1O2 sensor heater element burned out
- 2Open or short in O2 sensor heater wiring
- 3Blown fuse for O2 sensor heater circuit
- 4PCM fault
📞 When to Call a Pro
O2 sensor replacement.
🔧 DIY Fix Steps
- 1Check the fuse for the O2 sensor heater in the fuse box
- 2Inspect O2 sensor wiring harness for damage near the exhaust pipe (heat damage is common)
- 3Test heater resistance in O2 sensor — typical is 3–15 ohms; infinite = failed
Frequently Asked Questions
What does P0141 mean on a Toyota vehicle?
O2 Sensor Heater Circuit Malfunction (Bank 1, Sensor 2) — the heater element in the downstream O2 sensor has failed.
Can I fix P0141 myself?
Yes, in many cases. Start with: check the fuse for the o2 sensor heater in the fuse box If that does not resolve it, o2 sensor replacement.
How much does it cost to repair error P0141?
Estimated repair cost: $100–$300. This varies by region and technician.
Tools That Help With This Diagnosis
Basic troubleshooting tools grouped separately from the actual error-code explanation.
Multimeters
Useful for basic electrical checks when the repair path calls for it and the unit is safely isolated.
Driver sets
Useful when the first obstacle is simply reaching the part or hose involved.
Cleanup tools
Useful for drain and leak faults where standing water hides the problem.
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