Engine Error
P0037
HO2S Heater Control Circuit Low (Bank 1 Sensor 2)
Severity
Low
Symptoms
Check engine light, slight drop in fuel efficiency
Common Causes
- Failed downstream O2 sensor heater
- Wiring harness touching exhaust pipe
- Blown fuse for O2 sensors
- Corroded ground connection
How to Fix
- 1 Replace Bank 1 Sensor 2 O2 sensor
- 2 Reroute wiring away from exhaust heat
- 3 Replace related fuses
- 4 Clean ground terminals
Estimated Repair Cost
USD
$100
–
$300
O2 Sensor: $150 - $300