P0133
O2 Sensor Circuit Slow Response Bank 1 Sensor 1
Powertrain · Generic (all makes)System: Emissions + Electrical/Circuits
Safe to drive short term. Book a repair.
Likely causes
- Aging front oxygen sensor (slow response)
- Exhaust leak near the sensor
What to check first
Replace the bank 1 upstream oxygen sensor if it's original and high-mileage.
Typical repair cost
$100 – $350
Independent-shop parts and labor for the usual fix. Your price depends on the actual cause and the vehicle.
Next step
General information, not a diagnosis of your vehicle. Repair costs are typical shop ranges, not quotes.