What does code P0133 mean?
The front oxygen sensor responds too slowly to air fuel mixture changes.
OBD-II Code
P0133 — Oxygen Sensor Circuit Slow Response Bank 1 Sensor 1
The front oxygen sensor responds too slowly to air fuel mixture changes.
Common symptoms
- Mild hesitation
- increased fuel consumption
- delayed response
Possible causes
- Aging sensor
- sensor contamination
- exhaust leaks
Initial recommendation
Check for exhaust leaks, clean connections, replace sensor if response remains slow.
Safety notice
This information is for guidance only and does not replace a physical vehicle inspection or diagnosis by a qualified mechanic. If the vehicle has severe power loss, smoke, a fuel odor, overheating, brake or steering problems, or any unsafe behavior, avoid driving it and seek professional inspection.
Analyze this code with MecaOBD
Use the app to combine code P0133 with your vehicle's actual symptoms for more complete diagnostic guidance.
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