Engine Error
P0161
O2 Sensor Heater Circuit Malfunction (Bank 2 Sensor 2)
Severity
Low
Symptoms
Check engine light, longer time for emissions systems to ready
Common Causes
- Failed internal O2 sensor heater
- Blown O2 heater fuse
- Open circuit in heater wiring
- Corroded ground connection
How to Fix
- 1 Replace Bank 2 Sensor 2 O2 sensor
- 2 Replace fuse
- 3 Test and repair heater circuit wiring
- 4 Clean ground eyelet
Estimated Repair Cost
USD
$10
–
$300
Fuse: $10; O2 Sensor: $150 - $300