Engine Error
P0133
O2 Sensor Circuit Slow Response (Bank 1 Sensor 1)
Severity
Medium
Symptoms
Lower fuel mileage, failed emissions
Common Causes
- Contaminated O2 sensor (oil/coolant)
- Aged O2 sensor
- Exhaust leak
- Rich air-fuel mixture
How to Fix
- 1 Replace O2 sensor
- 2 Check for engine leaks (oil/coolant)
- 3 Fix exhaust leaks
- 4 Clean MAF sensor
Estimated Repair Cost
USD
$150
–
$350
Upstream O2 sensor: $150 - $350