Engine Error
P0137
O2 Sensor Circuit Low Voltage (Bank 1 Sensor 2)
Severity
Low
Symptoms
Failed emissions test, slight drop in fuel economy
Common Causes
- Faulty downstream O2 sensor
- Exhaust leak near the sensor
- Short to ground in sensor wiring
- Failed catalytic converter
How to Fix
- 1 Replace Bank 1 Sensor 2 O2 sensor
- 2 Weld or patch exhaust leak
- 3 Repair shorted wiring harness
- 4 Test catalytic converter efficiency
Estimated Repair Cost
USD
$50
–
$400
Wiring repair: $50 - $100; O2 Sensor: $150 - $400