Engine Error
P0141
O2 Sensor Heater Circuit Malfunction (Bank 1 Sensor 2)
Severity
Low
Symptoms
Check engine light, failed emissions test
Common Causes
- Bad downstream O2 sensor
- Wiring issues
- Open heater circuit
- Corroded connector
How to Fix
- 1 Inspect wiring near exhaust
- 2 Replace downstream O2 sensor
- 3 Check heater circuit ground
- 4 Verify fuse integrity
Estimated Repair Cost
USD
$150
–
$300
Downstream O2 sensor: $150 - $300