Engine Error
P0144
O2 Sensor Circuit High Voltage (Bank 1 Sensor 3)
Severity
Low
Symptoms
Check engine light, slightly decreased fuel efficiency
Common Causes
- Short to voltage in O2 sensor circuit
- Failed Bank 1 Sensor 3
- Rich fuel condition
- Poor ground connection
How to Fix
- 1 Trace and fix short to power
- 2 Replace O2 sensor
- 3 Diagnose rich condition (fuel injectors, MAF)
- 4 Clean sensor ground
Estimated Repair Cost
USD
$100
–
$300
O2 Sensor: $150 - $300