Quick checklist
Check O2 sensor, may need replacement
OBD2 Codes
P0133 – O2 Sensor Circuit Slow Response (Bank 1 Sensor 1)
O2 sensor slow response
Details
The upstream O2 sensor is responding too slowly.
Typical causesFaulty O2 sensor, contaminated sensor
SymptomsCheck engine light, poor fuel economy
SeverityMedium
DIY checksCheck O2 sensor, may need replacement
ToolsOBD2 scanner
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FAQ
Common questions
What causes P0133?
Faulty O2 sensor, contaminated sensor
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