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P0133 - O2 SENSOR 1/1 SLOW RESPONSE
This is the driver side upstream O2 sensor. It's switching less than 16 times during the 20 seconds that the onboard diagnostics are monitoring it. Problem could an exhaust leak, the O2 sensor signal or return circuit, or the O2 sensor.
Check for exhaust leaks. Check the wiring harness/connector attached to the O2 sensor. Finally, it could be the O2 sensor.
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