Quick checklist
Check O2 sensor heater wiring, test heater
OBD2 Codes
P0141 – O2 Sensor Heater Circuit Malfunction (Bank 1 Sensor 2)
O2 sensor heater problem
Details
The downstream O2 sensor heater circuit is not working.
Typical causesFaulty heater element, wiring issue
SymptomsCheck engine light
SeverityMedium
DIY checksCheck O2 sensor heater wiring, test heater
ToolsOBD2 scanner
Utilities
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FAQ
Common questions
What causes P0141?
Faulty heater element, wiring issue
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