What does code P0145 mean?
The rear oxygen sensor responds very slowly to air fuel mixture changes
OBD-II Code
P0145 — Oxygen Sensor Circuit Slow Response Bank 1 Sensor 3
The rear oxygen sensor responds very slowly to air fuel mixture changes
Common symptoms
- Increased fuel consumption
- check engine light
- delayed mixture response
Possible causes
- Aged sensor
- contamination
- small exhaust leaks
Initial recommendation
Check for exhaust leaks and 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 P0145 with your vehicle's actual symptoms for more complete diagnostic guidance.
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