Engine Error
P0163
O2 Sensor Circuit Low Voltage (Bank 2 Sensor 3)
Severity
Low
Symptoms
Check engine light on, failed emissions
Common Causes
- Short to ground in signal circuit
- Defective downstream O2 sensor
- Exhaust leak causing false lean reading
- Failing catalytic converter
How to Fix
- 1 Trace and fix grounded wire
- 2 Replace Bank 2 Sensor 3
- 3 Repair exhaust system
- 4 Test catalyst efficiency
Estimated Repair Cost
USD
$100
–
$350
O2 sensor: $150 - $350