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Home >> Ford >> 2000 >> Contour SE, 2.5 L, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 753 (Engine Controls - Powertrain DTC Charts & Descriptions - CNG, Flex-Fuel & Gasoline) >> Diagnostic Trouble Code (DTC) Charts >> P0133: Ho2S Sensor Circuit Slow Response (Ho2S-11)

P0133: Ho2S Sensor Circuit Slow Response (Ho2S-11)

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P0133 - HO2S SENSOR CIRCUIT SLOW RESPONSE (HO2S-11)

Description:  The Heated Oxygen Sensor (HO2S) monitor checks the HO2S frequency and amplitude. If during testing the frequency and amplitude fall below a calibrated limit, the test fails.
Possible Causes: 
  • Contaminated HO2S sensor.
  • Exhaust leaks.
  • Shorted/open wiring.
  • Improper fueling.
  • MAF sensor.
  • Deteriorating HO2S sensor.
  • Inlet air leaks.
Diagnostic Aids:  Access the HO2S test results from the Generic OBD-II menu to verify the DTC.
Application  Key On Engine Off  Key On Engine Running  Continuous Memory 
All - - GO to PINPOINT TEST H: FUEL CONTROL Step 2.
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