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Home >> Lincoln >> 2018 >> MKZ Select, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 70 (Engine Controls - Powertrain DTC Charts & Descriptions (Except Diesel & Hybrid)) >> Diagnostic Trouble Code (DTC) Charts And Descriptions >> P0133 - O2 Circuit Slow Response (Bank 1, Sensor 1)

P0133 - O2 Circuit Slow Response (Bank 1, Sensor 1)

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DTC DESCRIPTION P0133 - O2 CIRCUIT SLOW RESPONSE (BANK 1, SENSOR 1)

Description:  The PCM monitors oxygen sensor response time by commanding a calibrated fuel control routine. This routine sets the air fuel ratio to a calibrated limit to produce a chart oxygen sensor signal amplitude. This DTC sets when the oxygen sensor signal does not reach the predicted amplitude within a predetermined response time.
Possible Causes: 
  • Exhaust leaks
  • Incorrect fueling
  • Mass airflow (MAF) sensor (if equipped)
  • Intake air leaks
  • Contaminated universal heated oxygen sensor bank 1, sensor 1 (HO2S11) (if equipped)
  • Contaminated HO2S11 (if equipped)
  • Deteriorating universal HO2S11 (if equipped)
  • Deteriorating HO2S11 (if equipped)
Diagnostic Aids:   
Application  Key On Engine Off  Key On Engine Running  Continuous Memory 
KA GO to Pinpoint Test DW .
All others GO to Pinpoint Test DZ .
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