P0141
PowertrainOxygen Sensorlow severityO2 Sensor Heater Circuit Bank 1 Sensor 2
What P0141 Means
Malfunction in the downstream O2 sensor heater circuit for Bank 1.
Symptoms
- Check Engine Light
- Failed emissions
Common Causes
- Faulty sensor heater
- Blown fuse
- Wiring damage
Diagnostic Steps
- Check fuse
- Test heater resistance
- Inspect wiring
Where to start: Replace O2 sensor or repair wiring.
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